itemtest is behaving strangely

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I wanted to mess around with some weapons in TF2, so I went to the map "itemtest". I know that the weapons have to be mechanic-changing in order to work differently, but some strange things happened while I was doing this:
- The Atomizer, Winger, Machina, Disguise Kit, and Invis-Watches were nowhere on the list
- The Rescue Ranger shot Huntsman arrows
- Crit-a-Cola worked like the Bonk! Atomic Punch
- The Sandman/Wrap Assasin wouldn't let me fire the projectile
- The Vaccinator didn't have the resistances
- I can't be hurt in any way
as well as some other things. Does anyone know if this is a bug, or if it's just how itemtest works?
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How to use itemtest in TF2
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