Sequences / Replication

We're seeing some odd behaviour from a PostgreSQL group - one running as primary and the other as a hot slave using streaming replication.

When a failover event occurs and we switch to the hot slave as primary sequences in tables jump by 33 - so where the last number allocated in the sequence was 100 prior to failover once adding the next entry the sequence will produce the number 133. 

I've found the following post in the forums - but any advice on how to resolve or counter this would be appreciated.

Thanks in advance.