It happens. WR, and big school wr, often slide up fans boards because the get the best highlight videos. Then you get 120 guys projected as round 3-4 suddenly. Not counting the small school guys that slide into actual draft boards but not in our chatter.
Even a guy like our own Stevie Johnson slid from mid round to 7th. Once you get past the unique talents there’s a lot of guys that are interchangeable and scouts catch on ones they happen to like for whatever reason