be nice...
Yes, there is an adjustment for both the pitch and roll of the camera gimbal
From the app:
-tap "three dots" button upper right corner of app for general setting
-on lefthand side of the "general settings" screen swipe up until you see the camera icon
-tap the "camera" icon
-tap blue writing "adjust gimbal"
-tap blue writing "roll"
-adjust by tapping left or right "curved arrow" until white horizontal crosshairs are parallel with horizon
-tap white writing below "complete"
(I recommend rough adjustment on a flat surface on the ground and you can fine tune it when it's in the air later)
Best of luck and let us know if this helps, also how did you "snap" the camera back in the gimbal?
Happy 2018