Another option is to do another reverse,placing the medium at the bottom of your stack. There are pros and cons in having a medium as a brood box. Pro: you can use a med frame of wet brood over an excluder to encourage bees to draw out medium frames, you can use medium as a pollen box on the bottom when you overwinter which also raises your brood box and cluster (warmer). The Cons: inability to move frames to your deep brood boxes and the problem you just encountered! J