Your 100% sure your CPU is facing the right way? You shouldn't be damaging the CPU by putting it in right because it is slightly rectangular and my guess is if you have it in wrong you may have clearance issues that way. Just re-seat your CPU and be really really sure you have the gold arrow in the right spot.
So i just ran across a vid and apparently what's happening to me is normal.
There's a sound which is kinda bothersome when pulling down the lever to its proper position, sounds as if its grinding the top of the cpu. People are saying they're experiencing it aswell, and its normal.