Bob:
Good evening (long day for me).
What you have in your drawing is a 'no question' job, and there is no issue.
The way I read (past tense) the original post.
...Lets say you have a #4 to a water pipe and then a #6 from there to two rods. You can't run a #4 GEC from the service to the rod because the bonding wire to the pipe is too small. Running a #4 GEC to the water pipe would be OK. Running a #4 GEC to the first rod would be OK as long as a #4 connects the first rod to the pipe. Even if there was a #6 from the first rod to the second this would still be OK."
I read that as going from a resi service panel to the water pipe, and from the water pipe to the rods....just don't sit right...never have seen anyone go that route, even the 'lectrician named "self" & his buddy "homeowner". The route everyone around here takes is panel to water pipe, panel to rods; excluding the McMansions with ufers.
John
