If you have been on the diet since February (5 months), and only lost 22 pounds then I suspect that your body has adapted to the low calories and has significantly lowered its basal metabolic rate. You may find that shaking it up a bit, intermittent fasting, different amounts of activity, eating different amounts of calories on different days, etc. might be of benefit.
Hope that helps.
Regarding your comments on blood glucose levels, I appreciate your disappointment, especially after 5 months of hard work, but not everyone is going to see the full benefits of the diet. It just doesn't work that way. Although that is no consolation at all for the people who are in that group.