Either they changed the governor limit for the rate you can sell items on the TP, or there's a bug with selling. If you try to sell a few things in rapid succession, you get a red popup with the generic message "An Error Occurred." Prior to now, when you exceeded the sell limit, the error message was very specific in saying you had sold too much too fast and to wait a minute. Also, it was very rare to see that message since the limits changed a couple of years ago. This seems to be triggering on just selling 3-4 things in rapid succession (just through normal mouse clicking).