Probably compuer resolution.

When I play with mine - 1995 Z28 $EE VE Tables, the values stored in memory are 1 byte values ( 0-255 )

For the VE table that displays it as 0-99% there are 255 discrete steps you can store, so each step represents a 0.4% change.
The doisplay might calc & show fractions such as 51.33 but it'll round it to the nearest resolution of 51.2
If you can view the values as HEX it might make more sense.

I don't know enough about the smoothing function mathematically but I read to use 0.7 which may calc slightly bigger adjustments.
Unless you new value is over/under half you resolution the values won't change.

Hope that makes sense

Mitch