The posts that don't count are those you post. It does not matter who you are posting as. Later, if the pace slows down too much, we might make exceptions in order to prevent you from being locked doing nothing, but we'll have to do that on a case by case basis. This post timing system is important as it prevents you from, say, building an army of constructs or designing super-high-level minions.

If we do lift the restriction on it being only other people's posts, then we'd have to add a clause where double-triple-etc posts don't count. But at present we have no cause to make such a modification.

P.S. I would like to add that while you are creating a creature you are not limited to doing nothing. Although your Keeper is tied up, your forces are not. Your forces, presumably led by a Construct or two, can still go out and do things.