've been messing with the actions 'animate float' and 'animate float v2'.  Now, i'm not a brain surgeon, but I think there are issues with them. 
'Animate float' does not even work at all.  It gives a random number it seems.  
V2 sometimes works and sometimes does not. Sometimes it just pops to the end.  So if I try to animate 0 to 2, sometimes it will go directly to 2.  I go frame by frame and can see this.  It just passes over the animation graph all together.
Now, I have copied and pasted a working state over and the new state does not work.  Yeah, I did not change anything and the new state doesn't work.  really weird.
So I was wondering if other people have had issues with animate float and v2?  I have found other actions with bugs, so it's possible or maybe I'm just a tard.