Is this because you feel you aren't getting the best deal, like you said in your other thread?
Just looking at TSS, while I do see contracts below 65 per point, either they are for WAY more points than 140 (you mentioned 140 banked in your other thread so I'm assuming it's for around that price) so ultimately it would cost more, or they don't have banked points you can use.
I'm no expert in this, but if this contract works for you and your wallet liked the price a few days before, and you can use it, etc etc, I wouldn't necessarily back out. What if you back out, and by the time you can put another offer in, all the lower point cost contracts are gone?
Anyway, do the math like was suggested by someone on your other thread, so it's more of an objective decision...that's what I would do, at least. Though what do I know; we bought Bay Lake through Disney (and financed). I'm certainly not THE best one to give advice on this, LOL.