Help with inconsistencies: p0455, then P0506

OK my idle has been between 1500 and bogging only when temp is below 1/4 of the temp gauge, when it is above 1/4 everything is fine and car does not stall. I was studdering under throttle and got the codeP0455 for large evaporative leak. Two aftermarket gas caps later and the P0455 went away and so did the studdering under throttle issue. I also checked connections on the charcoal canister and everything seemed OK. About two trips later I got a P0506 and cold temp bogging and sporadic idle, once warm everything is OK. Anyone know a quick fix - like cleaning a sensor with computer cleaner or gum out or something? I really don't want to hit the dealer, but I need this resolved quickly as I am to start using this car daily for a new gig and may hit up to 600+ miles per week of local driving. Any ideas or previous experiences welcome....thnx

Im trying to source my parts, and it appears the throttle body is "loaded" with the sensors and they cant be bought alone

You check the aftermarket gas caps again? I just replaced an aftermarket MAP sensor vacuum hose again and when it originally broke after the OEM hose was replaced it tripped four codes.

other than swapping the cap, how would I check it??

Took it in for service, the fix was completely unrelated to the codes. The TechII read subpar on the MAF and Bank1 Sensor1 O2. Ill report back in a few days to see if this was the proper diagnosis. It cost a lot, so hopefully this post will help someone else out