Small Convoy Glitch

[Montbrun]

I'm on my second patrol in my new IXC, and am patrolling SW of Freetown. I get a Contact Report on a small convoy. I plot an intercept course, which takes me to Square ET62. It is August 22, 1941. I set up a good firing position, and note that the convoy consists of a Black Swan Corvette in the lead, flying the Free French "Cross of Lorraine" flag, a Tramp Steamer flying the British Ensign, and a Small Merchant flying the French "Tricolor." I disable the Covette with an engine compartment hit, and then turn to the cargo ships. I sink both with shots to the fuel compartments, and then finish off the escort. When I check the Convoy Plotting Screen, the Small Merchant has a green "sunk" icon.

1) Can I assume that the Small Merchant flying the French "Tricolor" was, in fact, Vichy, and therefore neutral at this stage?

2) If this is the case, why is this ship in this convoy, being escorted by a Free French Corvette, and in the company of a British cargo ship? Seems strange....

Thanks,

Montbrun

EDIT:
MODs Installed:

GW v1.00
Tonnage War Mod v1.03
Tonnage War Mod v1.03 Terrain Add-In
Extended Unified Campaign (GW+NYGM)
CA Officer Icons
Fubar Crew
IuB v1.03 NavMap Contacts (Tails)