@F.Camargo, as @Jay_B said, you need to edit the profile in the ProfileView that is out of whack. Rather than grip edit, I would draw 2 lines, one on each side of the current profile, from the start of the 'good' corridor profile to the start of the profile that is too short, then from end of that profile to the end of the corridor profile....the 2 green lines shown here:

Then use the Convert line to profile button and select the 2 green lines:

Then rebuild the corridor and watch the profileview correct itself:

For the intersection, between the 2 alignments, you may need to edit the Surface and Add lines to connect the 2 alignment centerlines.
