Matt,

If I understand you correctly, you are saying that when the Crankshaft is on TDC, the cam mark is 180 degrees out of position. If that is correct, that is not an indication of anything wrong. You must turn the crankshaft one more full rotation and line up TDC at the crank perfectly. THEN you can check the mark at the camshaft. Do that and then tell us where the cam mark lines up.

Good luck,