Sorry to hear about the trouble, and glad that you’ve got it up and (mostly) working.
Can you say what the “wrong” software was?
Since the WCB is losing position control, you should definitely stop and work without a brush until you’ve got that resolved. We have a long guide to troubleshooting WCB issues, up here: http://wiki.evilmadscientist.com/WaterColorBot_Troubleshooting
You may have, for example, extra slack in the cord that is getting caught somewhere, or (if a WCB v 1.0) need to adjust the motor current. If you can which version you have, and what things you’ve checked (on the troubleshooting list), we can help further point you in the right direction.
