Hi @weiji14, @pwessel ! Thanks for the clarification.
On a separate note, I used x2sys_solve to get the correction for the crossover bwetween these two tracks.
When I used constant offset correction (-Ec), I get these corrections, which seem way too high
dsdp74gc z 632.936
rc2711 z -632.936
But when I used linear drift (-Ed), I get these, which look right
dsdp74gc z 3.3087 -2.16173e-06*((dist))
rc2711 z -3.3087 0.0040923*((dist))
Is there any issue with the constant offset correction?
Also @weiji14, I was going through some of your code on Github. Most of them are calculating the crossovers. Do you have any code to solve the errors as well? 
Appreciate the help!!