Yes, most likely ...
The air that normale escapes from the engine is fed back to the airfilter, if it is overfilled there is also a lot of oil that will end up in the airfilter.
So gently tap off the excess oil (that's where the sight glass comes in
), clean the airfilter house and if the filter is contaminated with oil, you'll need a fresh one.Clean your engine from the excess oil and all should be ok again.
Good luck, let me know if all went well.
It sounds maybe a little strange but too little is always better than to much (with regard to engine oil).
Frank