JOG/MPG configuration issue

Hello;

I'm finalizing my retrofit and i struggle on the very last detail: the MPG.
My drivers are run by analog command and its works fine, I manage to get decent repeatability and precision.
However the MPG is a huge mess.
2 issues, the first one is the worst to me 
1. When i send only one pulse, the motor is not moving. When i send the second pulse, the motor moves and eventually catch back the 1 first pulse, no always. The issue is the same if joint.0.jog-vel-mode is 1 or 0.
My mpg-counts signal is straight forward and is working well. the axis and joint jog counts are equal to mpg counts 

2. When jogging, the velocity of my axis is not linear, it goes from 0 to 300 very quickly but by step (maybe 3 step by half a second) and does like this all the way

I attach my config as I'm a little bit lost on what should I do

Thank you