That's about what I did last time I funded Matchbook, except it was an e-check to WSEX, then WSEX came up with fees to transfer to MB while the check was clearing.( waived for me)
MB seriously needs a better way to deposit. You'll have to roll the money a few times at the other book first in most cases before the transfer can occur.
It is starting to show in their lines. They are getting to be WSEX'ed-up !