Hi gogo. I have absolutely no inside information on this, and am only sharing thoughts based on past experience and my recent communications with BWI IPO. On many occasions in the past, I've received conflicting information from different WDW sources and in the end, it's usually that one department receives updated info first and another department receives it later. Based on the other threads, it seems like:
1) The closure was moved from 1/28 to 1/2 and IPO does not yet have the most updated information. When I e-mailed IPO earlier this month, they said they get all their info directly from the BWI front desk. That sounds good, but who knows who has the correct info! For example, BWI IPO once told me that I had to go through the Disney Florist for any in-room celebrations - no exceptions. When I mentioned that a friend recently went through IPO, another IPO CM said that of course they could help me. (And they did - it was great!)
OR
2) The department drafting and sending the letter confused the Boardwalk Bakery closure with the pool closure, just had the wrong date or the renovation was pushed back to 1/28 after they prepared the letter. That would be great for those arriving between 1/2 and 1/28, but not sure if that's the case.
Luna Park is definitely closed for our stay in late January, so I'd love accurate info on the possible ability to use SAB. Sounds like a pretty firm "no" right now, but there is some hope because IPO told me the quiet pools are the only options "at this time" and that other options may be "forthcoming."