What was your food intake before you started the first time has your diet changed a lot this time or were you more or less eating pretty low carb before you started. There are a lot of variables in the equation.
One thing though, stop weighing yourself...easier said then done (trust me I know). The diet works and sometimes when you over analyse the scale the stress of it will help you hang on to some weight.
The diet works, it may not work the way YOU want it to work or as FAST as you want it to work...but it works, you've lost weight...3 lbs is great!!