I have my leadin count set to play a substyle fill, and I've checked the 1 bar lead-in box. The leadin play fine within BIAB but when I save the song as a mp3 file, the leadin is now 2 bars long. Is there a separate setting somewhere for the number of leadin bars for the output audio?

I am new to BIAB and enjoying it greatly, so I would appreciate any help you wonderful people can provide.