I've long wondered that as well, and have seen it be a bit of a mess there.

And speaking of T1 escalators. I'm annoyed that they took away the down near B7 and turned it into an up for an employee security checkpoint. All of the sudden I've been coming into the low B gates (instead of either end of C) the last couple of weeks and end up needing to go the long way out now to get down to baggage claim.