Application Alert Issue

Hello all, I seem to be having an issue with my alert sounds on my Twitter application. As you all know, the default alert sound is the Tri-Tone which can be changed. I have Tri-Tone set as my message alert sound, while having the Tweet alert sound set for Twitter. For some reason, it does not play this tweet sound for my twitter, even though I have it set to Tweet for twitter notifications it still uses the default Tri-Tone alert. Does anyone know a fix for this? I can give more details if needed. Thanks!