I moved it slightly over to the side as it could have been off a little being straight and made sure it had actually gone into the PCI slot with a little force but should be in.
The front protion doesn't move but the back isn't supported and has a tiny wiggle. The power cables above it aren't flexible at all and slightly touch my side panel I think although I can't tell.
My psu is modular and one of the extenders is plugged in like this: http://i.imgur.com/24dt1.jpg
I assume that's ok?