...A couple of things you have said ring alarm bells with me. Including guiding a persons hand to complete a task like a puzzle. I am not sure if you are aware but it is a very typical thing for some autistic children to do.
... Best of luck
Both of the boys did the hand guiding. The younger one more than the older one. But at least he's now trying to communicate with me more. Before I couldn't tell what he needs or wants. Now he's learned to grab my hands and drag me where he wants me (if he can't tell my verbally what he needs). Neither one of them can 'point' to things / directions. Just like neither one can tell where I'm pointing. (The older one has been giving me directions according to the GPS in the car since he turned 3 but can't find anything when point to it! ugh! lol) ... so, yes, I definitely have reasons for concern.