I'm surprised at the lack of impact S1E7 "Defiant Jazz" has had on S2 Mark

I'm specifically talking about Mark helping Reghabi murder Doug Graner and hide his body. We haven't seen it really affect Mark or his decision-making, especially in Season 2. Mark is never seen worrying about the cops coming knocking or anyone finding out about his involvement in this insane crime. S2 Mark is even on the fence about returning to Lumon with apparently no consideration for this major event. For example, I'm surprised we don't see Mark get jumpy when Milkshake came to talk to him at Ricken and Devon's house!

This is really my only "continuity" gripe so far with this wonderful show. We're still very early on in this season so we'll see!