How do you get back on track if, you are gaining weight with the band versus losing weight?

First thing I would do is get an upper GI to check your band and have them see if you need a fill (or unfill). During that visit, talk to the surgeon or dietician there.

I would consider a few things in the following order:

(1) check to ensure your band is in the green zone

(2) ensure you are eating to maximize the effect of the band to control portions and appetite

(3) highlight and recognise the core things in your lifestyle that may need to be looked at, such as non hungry eating, food types, fasting, activity levels, stress levels

Hope that helps as a start