Actually, even ignoring OW, seems odd that if any two airlines codeshare that they can't enter special requests in each others.....
The annoying is the OW link-up kind of words, I can see my IB/AA flights in BA!
I've done far better in the past on codeshares with Quantas/BA but I guess they've been at it for longer.
Anyway, roll on Monday and see if any of it works (maybe my BA profile VLML will leak through).