Music and Sounds dont mix?

Guys! I need help! when i use my music and then add SFX in another layer, my music fades for about 5 secs before it comes back!
Im using Stream and in the properties its 160 and unchecked box

ok so what does the unchecked box say?

Quote from notthebest

ok so what does the unchecked box say?

convert stereo to mono.

try setting the bit rate to the lower setting next to it. see if that helps

You can just add the music later, using a video-editing software.

You could also lower your sounds using the edit sound feature