By design, some words and character combinations do not expand.

Words do not autoexpand in the following instances:

To avoid interference with the most commonly typed (short) VB keywords, the following words and character combinations have been programmed not to expand:

me, if, or, is, as, in, on, do, the, then, to, er, err, call, else, sub, call, case, left, top, len, mid, next,

wi, wit, with
(typing "e" will autoexpand it to "withevents", if selected)

no, not (
typing "h" will autoexpand it to "nothing", if selected)

se, set (avoids expanding "set")

en, end (avoids expanding "end")

fo, for (avoid expanding "for")

no, not (avoids expanding "not")

an, and (avoids expanding "and")

ap, app (avoids expanding "app")

ex, exi, exit (avoids expanding "exit")