Ideas
Unsure if this was actually a bug or not, as it's been changed to 'fixed'. However, the client was changed..............well over a year ago maybe on how results in GAC/TW are registered.
Before, if you did nothing or put it on auto it would register as a result. The issue with this was that it caused the team you were facing to have the Turn Meter of when the battle ended. This is generally a bad thing. To counter this players would play in airplane mode, if the battle went well, they'd turn off airplane mode. If it went poorly, they force restart the client. You'd be registered with a loss, but without a turns taking place, thus no pre-loaded TM.
Obviously, having to interact with the client like this isn't good. So, CG changed the client so that when the battle ended you had the choice of uploading your result or not. If you don't choose a result within .....I think a couple of minutes, then it automatically doesn't upload the result. So, if you've been putting it on auto and walking away, you don't get an uploaded result.
I believe this is still the case as I lost my first battle badly in GAC today and didn't upload it, and didn't get 10 points.