I can understand why simply standing in line may not count to your stand goal. The Stand ring shows hours in which you've stood and moved for at least a continious minute. Even if you stand all day, you still need to move around to earn credit for standing. If your 0.2 mile walk lasted for more than a minute, that should have been registered. For more info, see:
Use the Activity app on your Apple Watch - Apple Support
The first (and simplest) thing to try if something isn’t working right is to restart your Apple Watch and its paired iPhone. If necessary (device not responding), try a forced restart. Both methods can be found here:
How to restart your Apple Watch - Apple Support
Restart your iPhone - Apple Support
If that doesn't help, the next steps would be to unpair and pair your watch again and restore from the backup just created. This should result in no loss of data. It deletes all temp and corrupted files and re-indexes the file system.
Unpair and erase your Apple Watch - Apple Support
Set up your Apple Watch - Apple Support