That's not unusual is it WA? All Lecturers (all diagnosing professionals or very high up types) we have mention the need to screen out Schizophrenia, and emphasise it as a possible misdiagnosis.
It's been different each timewith us.DS1 was the first and it was extremely relieving and extremely painful, DS3 it was harder as we'd been verbally dx'd then had it withdrawn several times so actually seeing it in writing was pretty hard.
However, when we were called into school and told ds2 had some SEN and probably either DCD or ADD (now think DAMP may be it) they provided tissues for crying but I ended up laughing- seemed to have reached the silly stage by number 3, although he has far less difficulties than the other two.
We're questioning ds4's development ATM because he seems a bit disparate (and becuase at 20 months with ur history it seems judicious to consider)- no evidence of ASD in some ways, but other flags and a few anomalies (the clingiest child ever for example, couldn't even leave him with my Mum until he was 18 months or he would head bang) and for the first time the idea of another one provokes real fear, hoping that we get to avoid that route.
With the older DX'snow I find that the AS one is a relief; he'ssevere enough to need specialist services and won't cope at MS Comp so I am so glad we got the DX at 6; however ds3 has lost ground and seems to be developing ADHD so its a constant fear factor that never gets to quite vanish, and ever changing- when he was DX'd we weretold to look towards supported living, now with the ADHD DH and I relaise there's a strong chance that will not be sufficient so feel a bit as if it has yet to resolve IYKWIM?