Missing Parameter - @MSp2pPostVersion

Hello,
We have the following replication scenario:
2 master servers that are involved in P2P communications. We'll call these Server A and Server B. Both of these servers have a P2P publication and subscription to each other. All of this is working fine.
Server A and Server B each have another transactional replication publication.
Two other servers (Server C and Server D) are subscribers to the transactional publication on Server A. These servers act as read only servers.
Replication to Server C and Server D fail with an error indicating that the "sp_MSins_dbo..." procedures are being called with too many parameters. When I run a trace I see that Server A is trying to call this sproc on Server C and Server D with the @MSp2pPostVersion parameter which doesn't exist. The parameter @MSp2pPostVersion is used for peer to peer replication, but Server C and D aren't involved in that so I don't get why they would be called with that parameter.
If we manually edit the replications procs on Server C and D and add this parameter then it works perfectly but this seems like a huge hack.
Is there any way for Peer to Peer replication to co-exist peacefully with regular transactional replication?
Hopefully this makes sense to everyone.
Thanks for any feedback!