Hi, Frank.
This is currently "as expected" behavior.
Selecting a route doesn't refocus the time graph. Selecting a period on the graph will set the route to match the route at the end of the selected time period, but not vice-versa.
We have worked on this in the past, but there are a number of complexities with this for which we have not yet come up with the optimal solution. If you're using PingPlotter Pro, we may be able to come up with a scripted add-in that does some of this for you (and makes some assumptions about your needs that can't be generically applied to everyone who uses the product). We've not done a script to do this so it may not be optimal with a plug-in either, but we should be able to do some of it.
- Pete