This is from the help file:
Import: If your filter wheel supports it, Sequence Generator Pro can import filter data (this will overwrite any existing data). This function will use the currently selected filter wheel (from the sequencing window). Note: If you are defining filters for a profile, the import will use the filter you have selected in the profile manager (not the sequencer).
I have never defined my filters in the ASCOM dialog, simply use the one in the profile. I never touch the Import button. Does this help?