Okay, I got rid of the random addition to your welcome event. That will get rid of the range.
I changed the column name for your points back to dbtech_vbactivity_points, to avoid that database error you were getting with infractions. I also disabled the points you were awarding in vbavatars so that you can control that through vbcredits.
I deleted the Credits currency and left your avatar points currency. I noticed that your events for it were all marked disabled - did you edit them individually or did the mass-update function work?
The Charges appear when a post/thread/etc is edited - it is to revert what the user initially got, and then they get a new transaction to reflect any difference. This is how vbcredits works, and the end result is the correct amounts the users should have gotten.
Do you need help with anything else?