It is quite common for people to get diagnosed with multiple diagnoses... Where & when I worked, you'd see those with many, many, many more "labels," than that!
And it's important, or interesting to note, a number of things, in particular with this specific one (schizophrenia). It's not quite the dark ages anymore with this thing. Or back when they thought they'd had little, or lesser "hope!" From an optimistic outcome point of view, or perspective. Now, another thing is that somewhere around 4-5 years ago, whenever that latest edition of the DSM-IV (?) came out, I thought I'd read that they were now suddenly going to be getting rid of the 6 subsets of descriptive definitions (or 'labels,') to be associated with it, because they'd found no conclusive evidence that it helped. To be known as, or diagnosed with "paranoid," or "disorganized," etc., schizophrenia. So, that's what they all know. Everybody's right here - in that it's ultimately a management of one's symptoms; in particular, those that seem to be affecting you most, or interfering with your functioning in normal every day life, that's the most important thing. It doesn't define you. Where I was working, I could select five people with the same diagnosis, and put them to-gether & you'd never in a million years have guessed, or been able to tell that they were as such. Just based on differences in things like personality and whatnot, alone. Alternatively, I could pick five people with different psychiatric diagnoses and combine them in a shared space, who have more similar sensibilities about them (things in common about how they are, temperament wise, and whatnot) & you'd think that maybe they would share the same. So, it's not the be all, end all. It just gives them - the doctors & your other health care professionals - a better idea on how to go about treating you. In terms of meds, and everything else~ If & when they come back with a further verdict or rendering on the whole comorbid thing, that may or may not help you. It depends on how you think, and how interested in this stuff you all are. For me, I could derive some benefit from it. But that is because of my interest in the field, and things like psychology. Other more normal people could maybe perhaps give less than a care!
And they may be right, by the way. . . : ) Good Luck, and Best Regards!