> As you can see from what I have, compare to the dat info, it's the wrong CRC,
> but ClrMame tags it as an uneeded file instead of wrong CRC.

The unneeded check is performed first. It scans the set and finds a not listed name (you current name is wrong). Then the name check checks the crc32 of that wrong named file and can't match it with a crc32 in the datfile. So the file is declared as unneeded and won't be touched by further romchecks like case, size and CRC32.

Roman Scherzer
ClrMamePro