Do not be frustrated, everything takes time
(coming from the self-declared most impatient one, haha).
Have you been taking your measurements at all? Sounds to me with your dedication on your treadmill that you may be gaining muscle and losing fat, which is what you want.
Our bodies
will build a resistance to exercise. The increased grade on your treadmill is fabulous, incorporate some interval training on it....like, running for one minute, walking for 2-3 minutes, repeat....at an increased grade. Don't give your body a chance to get used to what it can do physically. I have to keep doing this myself. When my body starts getting used to my interval training on the elliptical, I switch to interval training on the treadmill..and I add laps in the pool to keep up the confusion in my body. Jumping rope even helps by adding this for 5 minutes after a workout...and I don't think anyone could possibly hate jumping rope more than I do lol. It's a pain in the butt with all of the "this and that," but it keeps things more interesting for you and your body will respond better.
I'm not familiar at all with point plans, but keep your sodium lower and drink half of your body weight in ounces like azdevils mentioned to do. It seriously helps.
Let me share with you about this one woman who I used to workout at the gym with about 4 years ago (I didn't GO to the gym WITH her, she just worked out at the same gym with me).....this woman was 5'6 and 185lbs, a smaller frame. One of the best fit bodies I believe I have ever seen in person. She used to be overweight at 250lbs and lost it. Her 185 was pure muscle and she was very low in body fat. I am telling you, her body was a knockout. No one at the gym believed she weighed 185, she looked like maybe 130 lbs wet. She was a slim, little fit machine. Last week, I remembered this woman during one of my scale obsessive days. Well, like I said, no one at the gym...man or woman, believed she weighed 185...we thought she was pulling our leg. She went to the scale eventually to prove it and she was indeed 185. When she was at the scale I thought about how she said that too many people focus on weight loss & not fat loss! You know what, she was so right. Recently, remembering her & what she said has helped me ease up on my scale obsessive ways. I hope it will help you too.