Bob, what did you correct? If you upload the EXACT SAME LOG, just sign it with a different location set within TQSL, then it should correct the details of all those already confirmed contacts. I remember making a 'location error' on a grid trip once (might have been county, not grid) and fixed it just as described. The only QSLs that might require some other type of 'fix' beyond that is if the person has already turned in the QSL for VUCC credit (as the incorrect grid) on an application. If you correct things quickly, the likelihood of that is low.
To everyone who contacted me while I was roving in Capital Reef NP last Thursday, 4/18... I seem to have fouled up my upload to LoTW, all the entries are listed in grid DM58 instead of DM48. I tried to correct and upload to LoTW again, but it seems that most of our contacts have already been confirmed on LoTW. I will be happy to send any and all of you a QSL card confirming our contact, unless someone can tell me how to correct my mistake so you all can get a QSL out of LoTW.
Bob N6REK