It matters! Explanation:
Read about positions in Poker. It is an important matter. Since positions count with respect to them being as near as possible to the dealer position (going to the left), your position matters. The worst position for you is to be to the immediate left to the dealer, while your best position is being the dealer (you play last and get more information), and the almost-better position is the cutoff (i.e. having the dealer to your immediate left).
In practice you will count your position based on the active players (in this context, players who pay and post the blinds, and players not in blind positions).
The less active players preflop, the better your position gets if you are originally in the worst ones (you can discount the risk of your position if many "better" positions suddenly disappear or become inactive).
Now you have to pick whether you want to play or not, given that in order to play you must pay another, abnormal, non-regular blind due to not participating earlier in the bb.
Odds tell me that I'd like to play the BB only if I am in good position, or if it is my turn to post bb (which is actually the best position preflop, but bad position after), and knowing beforehand which players will not post BB that would be in better position than me could me help to decide whether I post or not (the most players posting in better position I know beforehand, the lesser odds for me to post).
Blinds are no different being regular or posted, even dead blinds. They are played clock-wise (before the card dealing starts) in every case since it is a regular poker action anyway.
Conclusion: not only on posting, but on every poker action does the order count! Better for you if you don't angle-shoot.