AutoCAD Inventor :: Dimension Values Incorrect On Drawing?

I'm using Inventor 2013.  I created an assembly where I did a lot of top down modeling (meaning components in the assembly were created in the assembly.  All but a handful of the components are adaptive to other components).  When I went to make my drawings for having the components made, I started noticing that some of the dimension values were wrong.  I could go into the model and verify the features, but when dimensioning on the drawing it would not match.  Furthermore, this didn't occur on every dimmension on the drawing.  Not even half of them were incorrect, but it only takes one to really mess up a part.

I've attached a screen shot of what I'm seeing.  The 15.2 and 5 dimmension are correct, but obviously those don't add up to 31.37.  I know I can manually override this dimmension, but only if I know to do it.  I tried to do a drawing of another part in the same assembly and eventually found a similar problem. 

Finally, I created a step file of the 1st part (to strip away the adaptivity) and when I created the drawing again, the problem went away.

My question is, is there something I did in the assembly / creation process that would have caused this?