I’ve been working on getting the vending achievement. A couple of days ago, I checked my tally and decided to be anal retentive and only vend enough to get it to a round number. I just vended 500 just before midnight and then another 500 after. Went to check my total to see how many days I have left and the number was wrong…it was too many. I wondered if it had tallied some button presses after running out of vends, which happens when I’m clicking rapidly. So, I went back and tested. Pressed the vend button 20 or so times even though I was out of vends for the day. Sure enough, my achievement count went up. I’ll try to be more mindful of my fast clicking as I approach the total for the day, but some people might take advantage of this bug.

Summary - clicking the vend button, even after running out of daily vends, still increases the achievement count.