Be sure you are NOT using the “Match” Buttons or Save All.. Button that pops up. Those are not active for any projects yet.
You should be able to open a project, load the section, vary it’s size, then hit “save project”, and enter a filename & click save. Ignore the Match Buttons and ignore the “Save all North sections” (or whatever it shows, West, East or South) button.
Then open the Section Selector, pick a new section and load it.
Make your changes and again hit save, but skip the Match Buttons and the Save All…
Now if you go back to the project manager and load the previously saved project, you will notice that both legs are the length you specified.
The Match & Save All is reserved for a future project function.