Weeks workout

Ok so we at about 17 weeks and a couple of days out from competition and I stepped on the scale and I am at minus 2 lbs. My trainer (Bob) says my weight can fluctuate 7 lbs....wow never knew that, so not getting really excited about the loss. Can't take my body fat measurements cause I keep getting an Error message. Will try to switch out batteries and see if it changes.
The workouts are progressing, added the explosive movement to the first exercise and definitely feel the challenge and the impact on the other exercises it has. Already increased the alt db bi curl and maxing at 40 lbs...wow! Gonna try doing 50 lb db chest press without assist. I think I have built enough strength to manage. Gonna switch my upright rows to something else...shoulders are hurting from the movement....my husband (a chiropractor) said the exercise can cause shoulder issues and impingement problems....he is right. If I incorporate upright rows back later it will be dumbbells. The exercises continue to be a challenge which I am happy about. Really need the focus and concentrate demanded by them.