Duplex Cancel 1 - Solved
Boston, Mass - Wesson Time on Bottom Duplex Cancel on Scott 184

The killer looks like a normal-ish football cancel. The Dial (CDS) looks more like a machine cancel than a duplex. Is it a duplex?
Duplex Cancel 2
Pine City, MN Cancel on Scott U165 (white paper I think) with star in circle for killer.

Just another fancy killer? What type of duplex is this?
Duplex Cancel 3 - Solved
Norfolk, VA, "Military" Duplex posted at the US Naval Training Station on Scott 405 I think, partially separated booklet pair.

Why just plain old "Military"? Why not "Norfolk, US Naval Sta." or some such thing?
"Duplex" Cancel 4
Trepeleau, WI cancel on Scott UX14 postal card.

A lovely cancel from a beautiful small town in Wisconsin where I used to fish one summer. I am guessing this is not really a duplex, but a CDS stamp and cork impression for a killer.
Duplex Cancel 5
Durand, WI cancel on Scott UX5 with a cross formée killer.

This is not a true color image, as fiddled with it to bring the cancel out a bit more. The cancel ink is a lovely lavender color. Is this another special duplex cancel?
Thanks guys for sifting through my riddles. They have kept me up rather late. Time for bed.