bonding ALB multihomed IP ARP problem

From tcpdump I'm seeing a slave interface reponding to arp request for

a downed multihomed/alias  IP
I've tried bonding mode 0 round robin loading balancing and the
problem doesn't occur.
I'm running RHEL5U1 and using Channel Bonding Driver v3.1.2
Steps to reproduce problem.
1) Setup two servers, server A and B, with bonds mode 6 ALB with
different IP addresses, each bond containing 2 slaves
2) Create Aliases i.e. bond0:1 on server A and B with same Ip addresses
3)  execute the following in loop
     ssh serverA ifdown bond0:1; sleep 5; ssh serverB ifup bond0:1
     sleep 5
     ssh serverB ifdown bond0:1; sleep 5; ssh serverA ifup bond0:1
     sleep 5
After a few iterations, duplicate ip address detected. I've increased
the sleep interval to 30 seconds and still have same problem.