Ah, thanks for the info. I must've been very unlucky as I tried twice

Didn't know about this SOI business so that explains it. In he end I remote jumped the carrier and caught up with it later.
On a slightly related related note, I've just created another video of Tyres doing his thing in his favourite high CZ layout... although the payout this time around wasn't exactly spectacular. There were a couple of glitches that could have worked to my advantage: points Charlie and Echo are/were never taken or even attempted by the enemy. Once these points were both up for capture, no other points became "open".
I could have just whittled the bad guys' progress bar down by shooting them all but that would've taken quite some time. Although the payout would have been something to behold
Also, it was a pity it wasn't in daylight but hey ho.