What is confusing you? To me it looks like she went down and then started coming back up at +4, so maybe getting kinda short action from the caninsulin. (I'm confused though because I'm not seeing the numbers you mention in your SS)
Remember that meters can vary without being "wrong", up to 15-20%. That means that if BG is 200, a meter could be reading 20% less, 160, and another one 20% more, 240. So a gap of 11 is really nothing.