I am on day 17 post op, I have lost 40 lbs since starting my liquid diet on 2/23, so I am very happy with that! I have an old doctors office scale with the weights that you slide at the top, everyday I have been sliding those weights down a little bit, and I leave them in that position for the nest day. I started mushies yesterday, and when I weighed myself this morning I actually gained a 1/2 lb!! I am very unhappy about this! I didn't eat much yesterday, two yogurts, aprox 4 forks fulls of tuna fish, and 2 fork fulls of egg salad. Is it normall to gain or maintain for a while when moved to mushies?

Stalls are extremely normal. It's water weight, and your body just adjusting. Take measurements, and then remeasure yourself when the scale doesn't move much.

Those kind of scales need to have their weights back down to zero when you're done or else it may need to be "zero'd" again. If you put all the weights back to zero and the arrow isn't perfectly in line then it needs to be recalibrated. They told us this when I was in nursing school. Some digital scales have a button for this.