kennyd pretty much summed it up.....The base reducer usually has a stronger bite then the clear reducer, and will attack the sanded through clear edge, it attacks by getting inbetween the base edge and clear edge.
shouldnt have to strip it and re-do those panels , just sand it and prep it with 800 grit or 1000 grit , 600 in my oppinion is to course ( has a harder feather edge and lifing will occure faster, let it gas off for1- 2 days and try it again, mix your first coat of base on the thick side and dust it , tac between dustings , and reducing a little each coat , this way having more color instead of reducer should help seal off the paint edge and stop the lifting, I will usually hit the repair area after 3 coats ( once dried for 15-20 minutes ) with 2000 grit to smooth the over spray out a tad , then spray one more nice coat, then let flash and clear.
When you do a BOO BOO like that , you dont need to use such a course sand paper as the base and clear will stick , as its fresh paint and hasnt been cooked by infared or heat booth. Air dry is still pretty soft and should have good adhesion with out having to rip it with 600 grit.

Spray