I've been logging in as jwt873..

Today I made a post and see that my user name has been changed to  fans8b45f001.

I logged out and logged back in, and the wrong username is still there..

Have I been hacked?  How do I fix this?  Will it affect my flying records?

Hi, please refer to this thread:http://forum.dji.com/thread-70494-1-1.html
You can change your user name in the "Setting" in your Personal Homepage.

OK..  Thanks DJI MIndy..   That explains it.