Yep, that looks about as obvious as it gets, placeholder-wise.
Maybe you can refresh my memory, but wasn't that ruled aimed at the people making the suggestion/command, and not the people doing the stepping down itself? As in, it's against the rules to ask someone to sit on a title until another character becomes available again, but not the act of sitting on the title itself.
'cause if the guy doesn't really want the position, what are you gonna do, force him to keep it?