Seems all the wreckage fell behind Pakistani lines so they get to control the information on it. Both sides agree two planes went down but disagree on if it was a wipe or a tie.
I have only seen evidence of one downed Mig-21.
Until i see otherwise I am going to assume the Mig was tailing something into the Pakistani side. It got shot down in the process but maybe it got a kill before it went down.