All routes exported to the Maddog format are truncated by PFPX during the export.
The route format for the Maddog has been the same for in the past 10+ years, however your export module has obviously not been updated, or has some sort of bug.
You can easily test it by trying to export a route file for the maddog and opening it with notepad. You will see that the airways are truncated prior the proper intersection.
The problem has been reported a few times by both users and us developing team.
We've made a point to support PFPX by working together with FlyPrecisely for a very precise profile, however we did not find the same interest from your side.
Could we have a timeframe for a hotfix which addresses this?
Fly the Maddog X Dev Team