Combinator Attack Rule Limits

I was hoping to do a multi-character toggle and I'm having some issues.

Here's the command:
oclHashcat64.bin -m 1000 NTLMhashes -a 1 Dictionary1 Dictionary2 -j "T1 T2 T3 T4 T5 T6" -k "T0"

After messing around with the -j and -k options, I was able get it work with a couple of characters being toggled in each (-j "T0 T1"). But when I go to toggle 6 characters, it isn't cracking a hash that it should.

Dictionary1 contents:
PASSWOR
Dictionary2 contents:
D123

Attempted password to crack: Password123

Am I wrong in thinking that
-j "T1 T2 T3 T4 T5 T6" -k "T0"
Should get me Password123? Or is there a rule limit that I'm not aware of.