2000 4x4 4dr blazer

When I replaced the plugs I disconnected the steering shaft and now when going straight the wheel is about ~15deg off turning to the left.
I disconnected the shaft and put it back on, but its keyed so where did the 15deg from from and what is the best way to fix it?
Also a note was not running right so it sat for almost 2 months, and now my rotors seem to be also warped, how would sitting cause them to warp?

Thanks

 

sometimes just from sitting the rotors dont actually warp but they will get rust spots under the pads or elseware on the rotor causing the brakes to jump and making them feel like they are warped. kinda a common problem with cars sit for a while.