What unusual effects work with the slider?

It seems that only a select set of effects work with the slider, because whenever I try to adjust my Time Warp Unusual hat, it won't budge one bit. Yet, when I try to adjust a Nuts n Bolts Unusual hat, it seems to move fine.

Is this a bug on my part? Or is there a predetermined list of effects that work with the slider?

From the December 20, 2013 patch:

Cosmetics

• "Head" and "Misc" slots for player loadouts have been converted to Cosmetic slots. All items that were previously Head- or Misc-slot-specific can now be equipped in any Cosmetic slot.
• Unusual effect positioning can now be adjusted for all Cosmetic-slot items
• Unusual Circling Effects have been given a new origin
• Unusual effects for all Cosmetic-slot items are now visible in the loadout panel and character HUD
• Fixed the Wiki Cap clipping with the Demoman's head