Yes your PFPX fpl does look odd. The BRENO 2A SID goes to INN and then to RTT. So you in effect double back on yourself.
Why does it look odd? Or do you mean the AivlaSoft EFB (not PFPX) picture?
There I wrote "The resulting file looks fine, but the display in EFB looks a bit strange".
Thomas to add RTT twice you can do one of two options. first load the fpl into your sim and go to edit. At RTT add an additional "phantom" waypoint after RTT and then add RTT again after the phantom. Then delete the phantom waypoint. Save the fpl and you're good to go.
Alternatively add RTT to the fpl opened in a text editor. Remembering to increase the waypoint numbering of course.
I have to try with the phantom waypoint in PFPX, thanks for the hint.
And yes, duplicating a single waypoint is very easy in a text editor (, but I wanted to see how PFPX and AivlaSoft EFB behave

Waypoint numbering is not included in the FSX XML plan.