Petrol in oil and oil loss

Hello, as some of you know, I didn’t swap the crankshaft on my scooter all too long ago. Apparently, all of this didn’t go as smoothly as I thought, because I had a bigger problem, rather than even 2. First I noticed 2 weeks ago, after the stronger rain, where my scooter had to be covered, that there were 2 drops under it, apparently engine oil. I didn’t think anything about it, because I thought that the rain might have washed dirt down. However, it is always the case that if the scooter is half a day or a whole day, under it are always 2 drops. So I looked and at the deepest place where the engine halves come together, it obviously flows out. I don’t know if I have not tightened the screws firmly enough, or if it is related to the next error: I wanted to check the oil level and, why ever, smelled on the measuring rod: the result is, there must be petrol in the oil, since it already In addition, the stand is probably slightly higher than I had filled in engine oil there. Can it be that by the fact that the whole gasoline has diluted the oil, it drips out below? Anyway, I want to eliminate the problem as quickly as possible, can you please help me to go through it? Where do I start with the search? The scooter runs well as usual, it runs without problems and also the speed has not changed. He also does not smoke out of the exhaust.