To add to the fun... on the Denon 3805, the 'Subwoofer Mode' option (where you choose LFE or LFE+Main) is NOT available when the speakers are set to small.
For music I run 2-channel in direct mode/small/80hz xo, with output to the sub.
So based on grunt's post above, it appears that the 3805 is defaulting to LFE+Mains mode when running mains as small.
Mains small XO=60 sub LFE+Mains: I had full range through the mains and sub working for all 3 modes.
Interesting jason, that you would have full range to your mains in this mode. Can't explain that one.