[sufreak]

If you use "movietitle (year)" as filename and "<filename> (year)" as folder name it ends in "movietitle (year) + (year)". So you just have to use "<filename>" as folder name. 

 Where would that setting be?  I did find the solution, maybe unintended.
Settings > Movies > General. Under Media List Options. If I uncheck "Display Year in List Title", then do a rename, the folder name comes out fine.  I would take that option to be a display option, not a file name option.  

I meant the renamer settings. Do you used $L somewhere is the renamer settings? That means "List Title" and can be ends in your issue. 

So it is the case. I used $L so it would be "MovieName, The".