Put the screws back to OEM config. Shouldn't have messed with them.
Oil coming out of the muffkin, to me, sounds like someone is using way too much oil1. Or one of those magic wondrous ultra EXTREME 100:1 oils at a regular 50:1 rate. Amsoil and the one that I use, forgot the name, are 100:1 rated. That oil is super thick compared to a 50:1 oil. Or the carb might be passing excess fuel???
I would put new hoses on the carb, clean the carb out, flush the tank out with gas only, clean the plug, pour in fresh 50:1 oil and gas. See what you got then. Might also clean or what I do, remove the muffkin spark arrester entirely.
slomo