Muscle soreness means your muscles are retaining water to help them heal. Google "why the scale lies" for insight. This water can show on the scale as a temporary gain, no loss or smaller than usual loss. It can take weeks/months to gain an actual pound of muscle. The exercise will help you lose fat/inches much quicker. Once your muscles get used to the new exercise, the scale will catch up. I haven't seen the scale move much lately, but I could fit in to shorts I couldn't a few weeks ago. Sounds like you are doing great. an epsom salt bath might help with soreness and cherries or cherry juice can also help.