I test my rom set (0.176) with vanilla dat and it seem to work fine maybe you need to create blank project for mame and use the dat file where you get your romset
I try romlister and spent some time with it,it export many file format one of then is mame xml and hyperspin xml,currently eo doesn't support mame xml format only dat,we 'll add this format in future release
the method below is not recommended for mame console,use add mame console wizardy instead:
If you intend to use custom xml or dat file when you add your mame rom to eo,you need to use different method than eo wizardy
let'us say you have created hyperspin xml output file using romlister,
add new blank console,scan for mame rom
from database menu>import database
select hyperlist xml type
uncheck"if rom is compressed check inside it for match"
check turbo speed (optional)
check "delete the rom not matched"
import your created xml file,it may take while