If the chosen field separator happens to be existing more then the number of fields defined in the config dialog - somehow the database gets confused and reports chopped off album strings and does other strange stuff.  

In the database it seems to also put them in the "Various Artists" db. 
The more filenames I clean up the less VA entries I have.

e.g. 

OK: TRACKNUM-ARTIST-ALBUM-TITLE
NOK: TRACKNUM-ARTIST-ALBUM-"Stairway-To Heaven" 

Idea: Introduce a reliable logic - this way you can adjust filenames accordingly:

 
E.g. - if  Field-Separators >  Fields-1 apply following logic:  

Field 1: TRACKNUM , 2: ARTIST , 3: TITLE , 4-x: ALBUM

Above could be made  configurable ( what field to use to put in the discovered fields 4-x) in the setup dialog. The order where to put the fields is defined in the config dialog.