Can anyone explain about this

I bought 15 shares of hindmoters at 14.15 rupees after getting a loss I sold it on next day… But it is still showing in my holdings

If you are checking on sale day you sold these shared, it will take next day to reflect the changes. OR else you might have sold shares from holding using MIS option instead CNC which means your Holding is intact and on top of that you had a short position.

I sold that yesterday… How to clear short position

It will be settled automatically post trading hours, before next trading session begins.

It will be cleared day after tomorrow. T+2 days. Here T is traded day.