TR-8S per-step automatization Problem

[kingofflakess]

Hello there. I asked this question before but I didn't get the answer :((

I have a problem recording "motion” (aka automatization) using per step method (''entering a value at a specified step" method from TR-8S owner's manual page 11, see screenshot).
Please watch and listen to short video that I attached.

For example I have 4 snare drum hits in pattern. These hits have Decay=50 by default. so I decide to utilise Decay=05 on 3rd hit. After that, as the loop keep playing, ALL hits after 3rd hit will be played back AS IF their Decay was =05 (athough, there is no recorded "motion" on following steps)
At the same time, i can manually (or tweeking knobs while Motion [rec] button is lit) record Decay=50(or any desired number) for all other steps , and now playback is ok, all "motions" are working...., but its not how it suppose to work, right? All no-motion steps that are played after steps with motion, seems to "pick up" last automated value.

I have this problem recording Decay, Tune ant Ctrl controls but surprisingly it works properly with Velocity changings - velocity can be easily modified per step-ly.

It seems to me that it is some software problems so I updated tr-8s to ver 2.51 (i bought it with ver 2.0) but it didnt solve the problem.

Please help, thanks