Last year I missed the PLT for a few miles so I ended on Gold. If my memory stills works I was never charged extra even when Gold when selecting exit seats (Label orange with 1,2,3 or 4 stars in AA.com). Tonight I tried to change my seat on my return flight and I can not submit unless I pay a fee. Is this new? Did I miss something beside my PLT for 3K miles :-) ??

Peter