At first:
All datas you are add to the COMMENT field are overwriting the datas supplied by the log program.
In all cases of evaluation UAAC suppose that the GRIDSQUARE is correct.
It calculates zones and states/provinces based on the center of the provided GRIDSQUARE!

Special hints for 30MDG
If you are registered with another call sign in the 30MDG than in the EPC. Please insert in the number page of the userdata window your 30MDG membership number (5 digits fill left with 0).
This must be done only rarely, but I have seen some SWLs ...
For all 30MDG awards SWL reports and contacts made at club, contest or special event call signs are not valid.
Please add #SWL for each SWL reports and #NO30 for each contacts made at club, contest or special event stations on 30m band to your comment field in your log.
This will do the trick for all clubs.

Error (not allowed signs in CALL):
You have other signs than [0-9][A-Z]-/ in the Call Sign
Error (in BAND):
Your Band is not one of these bands 160M, 80M, 75M, 60M, 40M, 30M, 20M, 17M, 15M, 12M, 10M, 6M, 4M, 2M, 70CM or 23CM
Error (in FREQ):
Your QRG doesn't fit to any of the above bands
Error (CQZ malformed):
Your CQZ doesn't fit to the format[0-9] or [0-9][0-9]
Error (GRID malformed):
Your GRID doesn't fit to the format [A-R][A-R][0-9][0-9] or [A-R][A-R][0-9][0-9][A-X][A-X]
Error (IOTA malformed):
Your IOTA doesn't fit to the format (AF|AN|AS|EU|NA|OC|SA)-[0-9][0-9][0-9] or (AF|AN|AS|EU|NA|OC|SA)[0-9][0-9][0-9]
Error (ITUZ malformed):
Your ITUZ doesn't fit to the format[0-9] or [0-9][0-9]
Error (WWFF malformed):
Your WWFF doesn't fit to the format xyFF-[0-9][0-9][0-9][0-9]

These errors can be fixed easily in your log program by fill the field with the correct data

Error (Grid-CQ mismatch):
The Grid you provide is not in the CQ zone you provide - at least one of the data must be wrong
Error (DXCC not in CQ_calc):
The DXCC is not in the calculated CQ zone, results usually from a wrong Grid
Error (DXCC not in CQ):
The DXCC is not in the provided CQ zone

Error (Grid-ITU mismatch):
The Grid you provide is not in the ITU zone you provide - at least one of the data must be wrong
Error (DXCC not in ITU_calc):
The DXCC is not in the calculated ITU zone, results usually from a wrong Grid
Error (DXCC not in ITU):
The DXCC is not in the provided ITU zone

Error (COUNTY not found):
The county doesn't exist in the list. Either not found in the state or it is misspelled
Error (COUNTY not unique):
There are six independet cities which have the same name than the counties, please add the AREA to the comment to make them unique (usually the city AREA ends on a C, e.g. VA, Fairfax: City -> #AREA US.VA.FAC, County -> #AREA US.VA.FAI)
Error (Grid-State mismatch):
The Grid you provide is not in the State you provide - at least one of the data must be wrong

Error (MUNICIPALITY not found):
The municipality doesn't exist. Either not found in the province or it is misspelled
Error (Grid-Prov mismatch):
The Grid you provide is not in the Province you provide - at least one of the data must be wrong
Error (Pfx-Prov/Terr mismatch):
The Province/Territory you provide matches not to the Prefix you provide - at least one of the data must be wrong