The last bullet says that "No other groups besides the necessary Auto-RP groups should ever operate in PIM dense mode." I see in the solutions that you set the interfaces to sparse-mode and add "ip pim autorp listener" in order to be able to flood the 2 auto-rp groups.
Can you also use sparse-dense-mode on the interfaces, and implement "no ip pim dm-fallback"?
Rob Gonzalez (CCIE# 20547)
Cisco Systems