I have noticed that if a web scenario step name is editted when trigger(s) have been created for that scenario/step then those trigger(s) will be lost (no warning) and have to be recreated.Changing the scenario name itself doesn't appear to have an impact.

I use a lot of single step scenarios to test web availability and performance for servers behind a load balancer. I don't know how this behaviour might change in multi-step scenarios. I assume it will be the same.