I think liviacat and farmergirl are onto something. With either of those factors (and hopefully both in unison!) helping, I bet it will be sooner to get in there than you were initially told. I have to wonder too if there is some kind of -- how to call it?-- unspoken space/arrangement?-- they can come up with for just such a situation. Also, and this is related to Chris' thought -- though from experience in unrelated fields....if someone ordered something like a not in stock item, or wanted to know how long a wait would be for food/a table, I'd "err" (on purpose) telling them the longer side of the estimate, even if the shorter wait was more likely. Why? Because earlier would be a pleasant surprise for them. But if I initially told them the earlier end of the estimate, and it didn't happen that way (by even one day or 5 minutes!), people would get upset. Which, hating conflict, I'd try to avoid(!) Don't know if this makes any sense.

Whatever combination of factors is in play, I hope it works out soon!
(Holding thumbs! )