Yeh maybe the buff icons dont want to drop down to the second line as thats at bit too close to the raid mob and they dont want to get hurt
Anyways sounds like its the volume fill to me, I will have a look and post a file here but this is somthing you guys are going to have to test for me also as max buffs I ever have is about 10 oks
*EDIT*
Oh there is no volume fill for that window lol... Also it all seem's in order to me 21 icons on the top 9 on the bottom row, I have changed the pack location on the last 9 to see if that is the problem..
Like I say you guys will need to tell me if its working or not and a SS would be most helpfull