Speed Reduction Not Working?

If I apply conditions like Grappled, Restrained, or Exhaustion Level 2, my character's speed does not seem to be affected.  I don't know if this is intentional or not.

 It also isn't reduced by too low STR for heavy armor. I'm sure it is on a very long list of things they want to add to the character sheet.

And it's not showing/working when I'm creating cursed armor (equipped obviously) with below modifiers:

• MODIFIER TYPE: "Speed reduction"
• MODIFIER SUBTYPE: "Impose" or "Remove"
• FIXED VALUE: "-15"

I don't think you can have negative numbers in fixed value.