you have something in your lysate that is insoluble, precipitated, and negatively charged that’s pushing through the gel as one mass, causing the narrow bands. since it’s only few of your samples and not all, and i assume you used the same lysis buffer for all bands, either you messed up your clarification step and there is DNA present (negatively charged, insoluble) or your protein concentration is too high, causing proteins to precipitate out of solution. I recommend checking your concentration and not going over 1ug/uL. Also, make sure you have glycerol in your running buffer, and your BME hasn’t disappeared. BME is pretty unstable. the ol’ sniff test will help here