Vortex's archive checker functionality is designed to read the archive's header to ascertain the target game for the archive - there is absolutely NO way this check would give false results - your mod archive has probably been created using outdated tools which were meant to be used with a different (older) game and therefore the fault lies with the mod archive and the mod author for not using the correct archive packing tools!
Your report has been added to this GitHub page as you've recently reported that Vortex is 'erroneously' reporting your game archive as incompatible. This issue has been created to collate all 'Incompatible BSA/BA2 archive' bug reports.
