I understand your frustration. I think overall that switching to WW is a great idea. I have done Atkins and while I got great results (and got to eat some yummy foods) I couldn't sustain it and gained it back. It just isn't practical unless you have a very sound support system. It's like you gain several pounds in water weight just the first few days off alone. I have learned carbs aren't the enemy, but I find myself tending to make lower carb choices when I can on WW, just because my brain is trained that way. The nice thing about WW is you will lose weight eating carbs! Woo! I loved learning to eat carbs and sweets in moderation and making them special treats - not binges to rock my blood sugar sky high. Remember your body's metabolism is adjusting and yes it is JUST WATER WEIGHT you're gaining
When you are storing carbs again your body will take on water is how I understand it. It's like when you started your diet, I bet you peed seven times in an hour.
Don't forget to include exercise!!!