And that behavior is exactly why I feed all of mine in their enclosures and not in separate feed tubs. Moving them when they are in feed mode is not something I'd want to do.
I was nailed by an adult female when I was on the hunt for a "smell" (a rat that one of mine killed but didn't eat) one day. I started going through the rack in the same order that I feed. She's so conditioned to that routine, she just "knew" that it was dinner time again. Stupid me didn't realize exactly what I was doing.
I'd move yours up to either 2 large adult mice each feeding or a small rat at that size.
For what it's worth, I've never fed in a separate feeding tub, and I've never been mistaken for food during routine cage maintenance and going in for handles on non-feeding days.