When I'm wearing non brother hood, green T-51b armor, and I sit down, the pauldrons mess up. Whenever you sit, the shoulder pads freak out and go a crazt angles while still attached to the armor. Just want to know if I'm the only one.

Yes it is a known bug across all consoles. I haven't experienced it myself but apparantly it happens with the T51b and T45d power armors.

I've seen it all the time with the power armor. Not just the T-51b, but also the T-45 or whatever the other one is.