To clarify, my setup is now work in the following configuration:
Slot A1 - Crucial 4GB DDR3-1333 1.35v DR x 8 VLP RDIMM 240p
Slot A4 - 4GB 2Rx8 PC3-10600R 1333-ECC
Slot A7 - 4GB 2Rx8 PC3-10600R 1333-ECC
Slot A2 - Crucial 4GB DDR3-1333 1.35v DR x 8 VLP RDIMM 240p
Slot A5 - 4GB 2Rx8 PC3-10600R 1333-ECC
Slot A8 - 4GB 2Rx8 PC3-10600R 1333-ECC
Slot A3 - Crucial 4GB DDR3-1333 1.35v DR x 8 VLP RDIMM 240p
Slot A6 - 4GB 2Rx8 PC3-10600R 1333-ECC
Slot A9 - 4GB 2Rx8 PC3-10600R 1333-ECC
36GB @ 800MHz
Apparently I just needed to rearrange it.