You know Orca, I don't think it is you at all.
In the past, when I would check a King room for my reservation when choosing between that and 2 doubles, the online system would automatically affirm my choice of room request in my reservation.
Now, I don't know if it is just me or bugs in my profile, but when I do make such a request, it does not seem to "stick" and make its way into the final confirmed reservation.
What I have found that I have to do to actually get it to "stick" is to indicate a King, click through to almost the final step before committing and confirmation and then 'BACK-CLICK" again to the room selection and again choose the bed type requested. Only after "back-clicking" and again selecting the bed type and then click onwards in the reservation process, does my bed choice selection actually get confirmed.
HTH,
NJ