Finding brood below the frame bottom bars is perfectly normal, especially if
the bees are in a nectar flow.  These are generally drones, and as such
scraping them off will do no harm.

As to the rest of your situation, I suggest you get a more experienced local
beekeeper to look at your colony and see if it is OK.  Whether or not there
is a problem will depend on the strength of your colony and the local
conditions.

W. G. Miller
Gaithersburg, MD