Mark,
There are many factors that will influence your shift pattern, but mostly they boil down to 2 parameters, and they are throttle pressure and speed. If you were driving very close to the shift point with a heavy load on cruse control, I would consider your first complaint normal.
On your second complaint of a delayed 3-4 shift, that will depend on throttle pressure. If the condition is pronounced regardless of throttle pressure, you need to visit the local Allison shop.
Gerald