I think that's right, and your room is one of the ones I would actually prefer (whether on the 3rd floor or 4th) as they're closer to the elevator. The other three on the 4th floor are past the desk down the hall, those are the ones I think are "protected" from being downgraded from Club Level. From what I know, you are also right in that all 5 of the 3rd floor deluxe CL rooms are outside the "designated" CL area.
Which means that only 3 out of 10 of the deluxe CL rooms are actually
in the CL area.
But.... maybe people who would formerly have stayed at a deluxe room at BC are now over in BWI, making their bookings better and possibly increasing the chances of Disney keeping those rooms in Club......