Help with PS3 Crossbar Swapping Randomly

[Sadana]

I'm sure this has been asked before but a forum search turned up nothing. So apologies in advance for redundancy.

While healing, I use xbar 3 for when I'm in a party and xbar 1 for soloing. While in a dungeon, my xbar swaps from 3 to 1 randomly. Say, I just healed person 2, cast a dot on a mob, and BAM back to xbar 1 while casting (thus my weapon isn't sheathed or anything which I've heard may cause xbars to change). X( What is going on and how do I stop it from swapping like this?

Thanks in advance!

eta: I hold R1 and use triangle and x for swapping between them, but I don't like looking down and discovering I'm on the wrong xbar! I need to be watching mobs and party hp!