diagnoses are so difficult. i had a bunch of testing done years ago as a child, teen, and adult, and i think it really just depends on how the results are interpreted by who is reading them.

i started out as a teen just having dysthymia, social anxiety, panic attacks with and without agoraphobia (alternating episodes), and at one point substance abuse (weed) in remission as diagnoses. then it was just borderline personality disorder since it was a catch-all for all my symptoms. it was left at that one diagnosis until i saw another psychiatrist for a second (more like third or fourth actually) opinion (after still carrying the borderline diagnosis but with probable DID). the other psychiatrist basically said i met criteria for borderline, schizoaffective disorder (i have heard and seen things externally), dissociative disorders (derealization/depersonalization and DDNOS-feeling other parts, hearing voices internally, feeling shifts of the parts, etc.), and random others things but did not 100% fit ANY of the criteria...so it led me to believe it's all in what they interpret your symptoms/results as since there can be so many overlapping things, and symptoms (for me anyway) can come and go depending on the day, life events, and other things...so i might meet criteria for one thing at one point then not at another point (although i think they go by what you experience in a six-month time frame maybe).

now, i am apparently moving out of the borderline diagnosis and more just dissociative of some type with anxiety and OCD (except that has ALL existed my entire life so am not sure why now it's becoming noticed).

diagnoses can be helpful, but also just plain confusing.

as a side note, i also have dyscalculia...i cannot understand math (even basic stuff) for the life of me. although, i am good at spelling, reading, writing, etc. oddly, i was never diagnosed with it in high school when tested for a learning disability...but they did figure out my short term memory sucks, so that was why it took/takes me a little longer at times to understand the concept of some things. they just didn't diagnose me with an actual learning disability since it didn't fit into whatever box they had of diagnoses...