Notes in clusters won't position themselves properly

I see this has been discussed, but I haven't found a solution posted. As you can see in the picture, I'm trying to enter an E for voice 1 and below that a B and a D for voice 2 and I can't get them to stop sitting on top of each other. E should be to the left with stem up and voice 2 with B and D should be to the right with the stem down. If I take out that B, then the notes assume the correct position. When I put it back into the chord, the notes on top of each other again. I saw something about "disallowing". But I couldn't find an explanation for how that would be done. Thanks for any help with this.