When using a first and second repeat there is brackets for N° 1 and N°2. now in Finale if you have more then one measure the first measure in the repeat will have a left bracket, the last measure in the first repeat will have a right bracket the measures in between isn't covered. then you need to manually pull the brackets together.
My feature would be that the bracket covers all measures automatically. It has ramifications if I do it manually, let say I add measures and the repeat moves, the bracket that was lengthened stays how it is even off the page. It doesn't follow with the measures in the repeat to the next system.