This shouldn't be happening.
I agree as well with GHG and JVS. My C5 has fortunately been very reliable. The washers are not required for these bikes....it was simply a little adjustment to tighten up the shifting in my bike.....driven primarily by a need to tinker rather than a design flaw!It does appear that there is something wrong with your parts. Hopefully you can get your bike fixed soon and go back to having fun instead of having to deal with these issues. I would second the recommendation to get this checked by someone who is comfortable with RE repairs. Wishing you all the best.GSS
And when I did talk to the dealer they made it sound like a rather big deal to this tinkering you are talking about. Like large amounts of labour for a breakdown. You can imagine why I am a bit hesitant to embark on that one quite yet.