Ok, I got your database and a schedule that wasn't working. First, the schedule was disabled, but I assume that's just a result of your testing. Second, your conditions were still marked Any rather than All, so I changed that:
I then changed the frequency to every 15 seconds and enabled the schedule. It didn't execute (as it shouldn't have because the variable was at 68). I changed the variable value to 40 and the next time it ran correctly (I added a text to speak on the action just so it was easier to tell if it ran). I then changed it back to 68 and the next time it didn't execute. So, with that configuration, it seems to be working correctly.