Bulk...You either have bad fuel (this can be magnified but not limited in cold weather and cause that cold start shaking you're experiencing) or you need a new oil seperator and probably a valve cover gasket too..the SES light you're getting is probably going to read a cylinder misfire..This just leads to more questions which then leads to the oil seperator..Hope this helps..

Oh, I wouldnt worry about the oil being overfilled a little bit..that won't cause any harm..Unless its severely overfilled and pretty much flying out of the dipstick...