I haven't seen tobacco plants since I was 16 or so. Look fine to me. Just sucker and top. We were poor white dirt farmers when I was a kid. I bought a 67 mustang cash with tobacco and hay money.
Can I ask where you bought your seeds, and which variety? I tried growing tobacco this summer, not a single seed grew beyond the seedling stage. In all different soils, mediums, locations, lighting. They all sprouted, then stayed as seedlings until they finally died off. Im guessing bad genetics or something.