question about property transfer

[usc001]

the velocity issue i encountered is that if i use path follow operator, the velocity/motion was not linear along the length of the spline. 
see in the scene attached; at some point happens a strong slow and then it suddenly accel. again. 
also, i copied the same spline 5 times and the path follow has no variation. yet somehow they are a bit offset.  

the set target looks good buuut i didnt paint the whole picture)
now looking at my goal again, i think if i you could point me towards solving the path follow issue i wouldnt need custom prop. nor set target. 

also, im again on an older version because of render farm (1.011); could it be that something about path follow got fixed recently?
sorry if thats the issue again, im always a bit behind on the version 

thanks!