Note duration not being respected
I'm relatively new to Musescore, so my problem may sound dumb.
My song has 2 piano voices (treble) added manually by going into "Instruments", clicking on piano and deleting the bass. It seems that both voices share note durations. For example, I want a half note in voice 1. At the same time, I want voice 2 to be playing eighth notes. When I hit the play button, the half note in voice 1 takes the duration of the first note being played on that compass in voice 2, that is, an eighth note. I just discovered this by testing cause I could not find a reason for the note stopping. I just change the voice 2 to be a quarter note and the half note in voice 1 stops later. I have no idea why this happens.