The other part of this is that it seemed like the real solution only came when the child was able to communicate better. So this reminds me of many technical problems I have had in a way. Most technical problems cannot talk of course. But they were similar in that the solution only came when the true cause of the problem came to light. Anyway maybe there is some commonality between a pre-speech child with a behavior problem and a thorny technical issue.
I guess I am lucky in a way that I only need to deal with technical issues because systems usually operate on a totally logical basis and it seems much less stressful than dealing with children.