Ok so here's my issue:

 

I set the bot to vendor every 3 hours. When I get back after a long AFK, he has mailed a few items here and there. While watching, he went to the nearest box/vendor and sold trash/mailed items. Is there a trick to getting this feature to work correctly? I want him to grind straight thru until the time limit.

Hello,

 

I am not sure to understand what you want. Do you want than WRobot go to vendor/mailbox only every 3 hours (and continue to grind/farming even if bag is full)?

 

Currently, WRobot go to vendor/mailbox every 3 hours (if timer is enabled), and go to vendor/mailbox between if your bags is full, if you need to repair.