Small values (non-integer) look choppy, not smooth

[userqt]

I am tweening a simple animation on the x axis from values between -10 to -8. This is done over the course of 20 frames. It looks choppy. Are non-integer points (floating point values) not interpolated? It should tween I suppose in this way: -10->-9.5->-9->-8.5....
But it doesnt look to be doing that. It simply "jumps" to the integer value -10->-9->-8.

How can this be resolved?

[trusktr]

@userqt Hello! This is a duplicate of #116