Out of the properties I've stayed at which have Honors floors, their location seems to be completely random, some have them at the top, some on the ground and some in the middle. In general the layout seems to be exactly the same as other floors. When I get a true upgrade (i.e. suite, larger corner room) it is often not on the Honors floor(s). Sometimes the Honors floor is far away from the lounge floor.

Re OLCI, the 12th floor room is probably classed as a different room type to the ones on the 3rd-9th floors, so the system wouldn't offer it to you