They may have changed the style or look of the lock-on plug section, but it appears that the tracks with rail break are using the wrong rail on the second track.
The directions for accessory activator track make note to use the breaks on the rail opposite the lock-on. In the photo, I see a break on the same side as the lock-on.
If you look on the bottom of the activator track, the white wire is connected to the isolated rail. The 5" tracks with the rail break align with that rail.