Man, you have a problem. If you only had 2 quarts in the bike the oil indicator should have been dry. Have to ask the question, if you checked the oil indicator, did you check it with the engine shut off and level? There is no way your engine could have 2 quarts in it and indicate it had 4. Don't add up. Either your engine was low from new or it burnt or leaked 2 quarts very quickly since you stated that it was checked.
Since obviously you installed 4 quarts what is your indicator showing now? Should be half way on the window.
You probably didn't do any obvious damage because your engine is still running. Maybe some minor rod/main bearing wear if some air was ingested and caused the oil to foam but....
