Oil in the air intake hose

[Npeterson212]

My 08 Aveo5 LS was running horrible yesterday and the SES light was on. At one point the light started blinking and the car began to stall out. After I pulled over and checked the code, it was the camshaft position sensor. I just replaced that sensor and while tearing it down for the replacement, I found a mouse nest in the bottom of my air box which caused some serious buildup in there. I also notice that there is some oil in the air intake hose and there is a hose that runs from the top of the crankcase over to that air intake hose that it seems to be coming from. Aside from cleaning out the air box and dropping in a new filter (and launching an all out Bill Murray style attack on the mouse) is there anything more I should do or any reason to be concerned about the oil making its way into the air intake hose? It certainly doesn't seem normal, but then again, I don't know what the purpose of the hose is that allows the oil to make its way there either. I'm a weekend warrior that knows just enough to get myself in trouble and then force myself to figure out how to get out of said trouble!

Thanks!

Nick

Edited with pictures attached.