Summary

Various The American Bee Journal, Volume XXXIII, No…

I think they mostly claim that honey is the medium through which the disease is spread. Now I have evidence which proves beyond a doubt that bees in robbing a foul-broody colony do not carry the disease to their hives in honey, but I don’t wish to be understood as saying that the disease cannot be carried in honey, for honey that is extracted from foul-broody combs, where the foul matter is thrown out of the comb into the honey, for such I have never tried, for I always boil and skim it properly before feeding it to the bees.
Source: Gutenberg

Various The American Bee Journal, Volume XXXIII, No…

Without a queen, bees don’t seem so intent on building comb, but with a queen you would likely find them clustering in the open space left beyond the two dummies, there to build combs.
With the queen left in the hive, as in your case, you should have filled up the vacant space in some way, so the bees couldn’t occupy it. If the space for the brood-nest is limited, the tendency of the bees is to build additional combs at the side, even if one or two dummies are in the way. Perhaps it is not necessary to have the dummies so close to each other as you get farther away from the brood-nest.
Source: Gutenberg

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