I need some opinions/suggestions/thoughts

I usually have 1 shake (5pt) for breakfast, thats after 45 min on the treadmill in the morning. I just recently started going on in the evening too for 45-1hr. I was trying to kick things up since I have been yo-yoing up 2 lbs down 2 lbs for several weeks. I was planning on adding in a shake after my second round, thought it would have some benefits... cut my hunger in half before dinner(which is when im usually "bad"), another milk serving, and more protien, less carb. It would be 10 pt out of my 29 target though. FI says he doesn't think that I need the second shake because im not muscle building, im only doing cardio which doesn't break down muscle as much. Would 2 shakes a day be too much for someone who really wants the weight to come off!?!?!