Some collections it does not have any problems and will keep it separate, but others it continues to combines. Not sure what is the difference to cause it. I will give it a try.
Do you mind sharing what renaming program you use that automatically puts the IMDB in there?
TV show format
Show Name: ${showTitle} (${showYear}) {tvdb-${showTvdb}}
Season: Season ${seasonNr2}
Episode Name: ${showTitle} (${showYear}) s${seasonNr2}e${episodeNr2} ${episode.title}
Movie format
Folder format: ${title} (${year})
File format ${title} (${year}) {imdb-${imdb}}