Oil on pistons?

Probably washed the cylinder walls with that ridiculously rich condition, rings may never seal, and no, wet oil on top of the pistons is never normal. Fix the horrible tune up, change the oil and run it hard a few hundred miles. If it doesn't clean up, the disassembly and re ring is in your future. Blow by, "the puffing" you see out of the valve covers is another indication of poor ring seal.