I have been studying the documentation and testing different commands. I think I know what happened - basically something got turned on that should not have been. The problem is that the documentation on this one is really bad. My initial assumption, about change route Avoidances, was that listed avoidances were things that we being avoided and not might be avoided. Clicking on one of these items selects that item, clicking on it again, does nothing - it remains selected.
There some change route avoidance settings of interest. One thing they never explained was that the change route avoidance settings does NOT list things that are set but, rather, things that might be set. There are no indications that things that might be set are actually set. As far as I can tell the avoidance settings are the only ones like this, the rest have check marks. So, if you are dealing with "avoid special sections" you will get a list of things that the system assumes are special sections. If you click on one of them you will be shown a little make with the original route shown and then the new route with a little "accept" button on the bottom of the screen. The colors are different for the proposed change and the old route. My error was 1)not understanding the various items in the avoidance section were existing item in the route itself. I think I now almost understand.
I also found out that change route Avoidances, once set for one route will be automatically selected for future routes! This one is sneaky (be careful)! I have no idea how to turn off this but I suspect its buried in there somewhere. What happened to me is that the first route got I5 freeway selected (don't remember doing that but, sometimes, I start pushing buttons <sigh> Anyway, when I entered a second route that route also avoided I5. I have also found out (I think this is right), that if you restore an original route it will magically get rid of ALL change route Avoidances! As far as I can tell this is the only way to do that. All in all change route Avoidances remain somewhat of a cipher.
I just read the above and its almost as confusing as the real documentation. If anybody reads this and find that I am flat out wrong about this stuff PLEASE let me know!
I should add that I have owned this car since the end of 2017. I have studied on the manuals. They are pure drek (full of information one must skip around for. One thing refers you to a different page which, in turn manages to refer you someplace else until it becomes blah, blah, blah. Unless they have improved their documentation they should really hire somebody who understands writing documentation and do it right. I think the error was that they hired somebody who really understood the system and hadn't a clue about documentation and dummies such as myself.