that was possibly just some attendant accidentally messing up which hopper they refilled (or with which coins), or someone screwed up the assignment on the cont

that was possibly just some attendant accidentally messing up which hopper they refilled (or with which coins), or someone screwed up the assignment on the control board which hopper was connected to which bus identifier. Reminds me I gotta eventually write up what I found reverse-engineering the one armed bandit in my basement LOL