Hello Lila,
This is normal, and it is one of many reasons why we tend not to analyze Euler angles directly. To put it simply, there is more than one way to describe a particular crystal orientation with Euler angles, so two sets of Euler angles which have very different values may in fact be similar or even identical orientations. If this is a problem, and you need a single orientation to be described with a single set of Euler angles, try looking into any Dream3D filters which mention a "fundamental zone." However, I would recommend first looking into alternate ways to perform your analysis before resorting to this, as there are many other reasons why Euler angles are not ideal for analysis.
Regards,
Joe