Song with slightly different notes on two measures only

I am scoring a song that has a slightly different melody on only 2 measures of verse 2. I would like to show this without making an overly long score. It seemed like adding a second voice and putting parentheses around it would work, but I am running into difficultly adding the verse 2 lyrics. They keep tying back to voice 1, even though I click on a voice 2 note and then CMD-L. It is in measures 4 and 5 of the attached. Voice 2 is shown an octave higher than it would be sung, as I have not yet figured out how note this or to add the parentheses.

Is there a better approach to this? [Apologies if this is easily found. I use MuseScore rarely and forget much in between each use.] Thank you!