I try to use the most recent rankings, which for main draws means the ranking on the Monday that the tournament starts. For qualifying, I just use the rankings shown on the draw, i.e. the ranking from one week early, and usually can't be bothered to substitute it with the new ranking if the FQR is played on Monday.

So, I was just trying to be consistent with what I do for every other tournament, but I realise it must have looked confusing and I intended to add a little note about it but forgot.