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Why does the camera time profile not respect the mark in and mark out ?

you mean when you stretch out the curve graph and have your In Out marks delineated, it doesn't just play between those two points? It does do that here.

yes thats what i mean.
and no, it doesn't do it here...:

So what does it do; just keeps running past the marks? Do you have the Mark IN/ OUT activated? It's hard to tell with your marks being so tiny.

yes they are active but still the camera keeps moving past the mark out,
ending only at the last frame of the longest layer in the clip.

That is so weird and I assume that without the graph panel the markers do work. I'm stumped as much as you are. Reboot?