Resetting UITableViewCell Not working properly / Unselected Cells appears selected after scrolling

Problem is when I am scrolling the tableview after selecting a collectionViewCell (violet color on date 28). Few CollectionViewCells at the bottom of tableview appears to be selected (Here CollectionView is present inside TableView).
(Sample Project can be found here : https://www.dropbox.com/s/ug1p7u6slsyyger/Demo2.zip?dl=0)
Code is like this :

class ViewController: UIViewController {

    @IBOutlet weak var tblView: UITableView!

    var storedOffsets = [Int: CGFloat]()           // Will be used by JTAppleCalender
    let formatter = DateFormatter()                // NSDateFormatter


    override func viewDidLoad() {
        super.viewDidLoad()

        self.tblView.delegate = self
        self.tblView.dataSource = self
        self.tblView.reloadData()
    }

    func handleCellConfiguration(cell: JTAppleCell?, cellState: CellState) {
        handleCellSelection(view: cell, cellState: cellState)
    }


    func handleCellSelection(view: JTAppleCell?, cellState: CellState) {

        guard let myCustomCell = view as? CalenderCell else {return }
        if cellState.isSelected {
            myCustomCell.contentView.layer.cornerRadius = 10
            myCustomCell.contentView.backgroundColor = UIColor.init(red: 0.26, 
green: 0.10, blue: 0.39, alpha: 1.0)
        } else {
            myCustomCell.contentView.layer.cornerRadius =  0
            myCustomCell.contentView.backgroundColor = UIColor.clear
        }
    }
}

UITableViewCell :

class TableCell: UITableViewCell{

    @IBOutlet weak var lbldate: UILabel!
    @IBOutlet weak var collectionViewDate: JTAppleCalendarView!


    override func prepareForReuse() {
        super.prepareForReuse()

      }
}

extension TableCell {

    func setCollectionViewDataSourceDelegate<D: JTAppleCalendarViewDataSource & 
JTAppleCalendarViewDelegate>(_ dataSourceDelegate: D, forRow row: Int) {

        collectionViewDate.calendarDelegate = dataSourceDelegate
        collectionViewDate.calendarDataSource = dataSourceDelegate
        collectionViewDate.tag = row
        collectionViewDate.setContentOffset(collectionViewDate.contentOffset, 
animated:false)
        collectionViewDate.reloadData()
    }

    var collectionViewOffset: CGFloat {
        set { collectionViewDate.contentOffset.x = newValue }
        get { return collectionViewDate.contentOffset.x }
    }
}


extension ViewController : UITableViewDataSource, UITableViewDelegate{

    func numberOfSections(in tableView: UITableView) -> Int {
        return 1
    }

    func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
        return 7
    }

    func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) ->
 UITableViewCell {

        let cell = self.tblView.dequeueReusableCell(withIdentifier: "TableCell", for: 
indexPath) as! TableCell

        cell.lbldate.text = "date "+"\(indexPath.row)"
        return cell
    }


    func tableView(_ tableView: UITableView, willDisplay cell: UITableViewCell, forRowAt
 indexPath: IndexPath) {

        guard let tableViewCell = cell as? TableCell else { return }
        tableViewCell.setCollectionViewDataSourceDelegate(self, forRow: indexPath.row)
        tableViewCell.collectionViewOffset = storedOffsets[indexPath.row] ?? 0
    }

    func tableView(_ tableView: UITableView, didEndDisplaying cell: UITableViewCell, 
forRowAt indexPath: IndexPath) {

        guard let tableViewCell = cell as? TableCell else { return }
        storedOffsets[indexPath.row] = tableViewCell.collectionViewOffset
    }

}


class CalenderCell: JTAppleCell{

    @IBOutlet weak var lblDate: UILabel!
}




extension ViewController: JTAppleCalendarViewDataSource , JTAppleCalendarViewDelegate {


    func calendar(_ calendar: JTAppleCalendarView, willDisplay cell: JTAppleCell, 
forItemAt date: Date, cellState: CellState, indexPath: IndexPath) {
        let myCustomCell = cell as! CalenderCell
        sharedFunctionToConfigureCell(myCustomCell: myCustomCell, cellState: cellState,
 date: date)
    }

    func calendar(_ calendar: JTAppleCalendarView, cellForItemAt date: Date, cellState: 
CellState, indexPath: IndexPath) -> JTAppleCell {

        let cell = calendar.dequeueReusableJTAppleCell(withReuseIdentifier: "CalenderCell", 
for: indexPath) as! CalenderCell
        cell.lblDate.text = cellState.text
        self.calendar(calendar, willDisplay: cell, forItemAt: date, cellState: cellState,
 indexPath: indexPath)

        return cell
    }

    func calendar(_ calendar: JTAppleCalendarView, didDeselectDate date: Date, cell:
 JTAppleCell?, cellState: CellState) {
        handleCellConfiguration(cell: cell, cellState: cellState)
    }

    func calendar(_ calendar: JTAppleCalendarView, didSelectDate date: Date, cell: 
JTAppleCell?, cellState: CellState) {

        handleCellConfiguration(cell: cell, cellState: cellState)
    }

    func sharedFunctionToConfigureCell(myCustomCell: CalenderCell, cellState: CellState, 
date: Date) {
        handleCellConfiguration(cell: myCustomCell, cellState: cellState)
    }

    func configureCalendar(_ calendar: JTAppleCalendarView) -> ConfigurationParameters {

        let currentDate = Date()
        let endDate = Calendar.current.date(byAdding: .month, value: 4, to: Date())
        let parameters = ConfigurationParameters(startDate: currentDate,
                                                 endDate: endDate!,
                                                 numberOfRows: 1,
                                                 generateInDates: .forFirstMonthOnly,
                                                 generateOutDates: .off,
                                                 hasStrictBoundaries: false)
        calendar.scrollToDate(currentDate, triggerScrollToDateDelegate: false,
 animateScroll: false)
        return parameters
    }

    func configureVisibleCell(myCustomCell: CalenderCell, cellState: CellState, date: 
Date) {
        handleCellConfiguration(cell: myCustomCell, cellState: cellState)
    }

}

Let me know if i need to add anything else.


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