A couple of things....
Oil of wrong type can evaporate and cause haze on lens surface.
Too much oil can leak and go into places where it shouldn't.
Gunked up oil is still in there.... loosened/dissolved by new oil and solvent, it will gunk up again,
Typically, putting unknown oil of unknown quantity into a precision instrument is a risky thing.
I think it's a good idea to get it cleaned up and lubed correctly. I don't think you caused any immediate problem though.