I am travelling LAS-LHR-MUC, return, in Business Class (LAS-LHR booked as fare class I, LHR-MUC booked as fare class J). Ticketed through AA, but all BA metal. No status on either BA or AA.
I've paid for seat assignments on the LAS-LHR legs. At the time, speaking with the BA rep, he was vague about seat selection on the LHR-MUC legs. When I log on to the BA website, it shows me with seat assignments to MUC, but I can't change them.
Is that normal?
You should be able to change them online. As you are booked in J fare class for LHR-MUC you are entitled to free seat selection.