Often escorts (esp. A2A) don't form up. They usually DON'T fly in circles around you, but often they position themselves high and in front of you to sweep ahead for threats. It is possible that with such a large escort flight, some are sweeping ahead, while some are constantly checking your six by circling around. As long as they keep up with your flight, it should be OK.
If you go to the COMMS menu (SHIFT-TAB) is ESCORTS available??? If so, then it would appear that the ESCORTS are doing their thing.