[Resolved] Final Cut Pro X Audio Problem

I'm having a really odd problem with my audio on FCPX. There are 2 audio tracks, music and dialogue. It plays perfectly fine in FCPX, but when I export it, the video only plays the music track and not the dialogue track. The video codec I am exporting it with is H.264.

The weird thing is it exported fine before, but I made some tweaks to it and now it won't export properly.

Any suggestions?

Edit: It worked after the exporting it the third time. It makes no sense to me since I didn't change any settings for the exporta... I'm not going to complain though, my problem magically fixed itself!