Montage Time Stretch Curves Scale Incorrectly

More details in attached UDN [Link Removed]

Time stretch curve behaves incorrectly with large sections of in-between values.

From the UDN:

After using the feature a bit more we also noticed that there seems to be a connection between the play rate scale and duration of slow down.E.g. an animation with the same "plateaued" curve wil slow down and speed up at differnt times (sometimes before, sometimes after it is expected) depending on the rate scale setting and how long the plateu lasts.

Video attached displaying the issue

1. Create a time stretch curve for a montage
2. Set it up so that it's:
   1. Value of 1 for the 1st third
   2. Value of 0.5 for the 2nd third
   3. Value of 0 for the last third
3. The time stretch curve will behave incorrectly in the middle section