DFS and filtered files

Hi All,

We have 2 2008R2 DFS servers syncing data between them via numerous replication groups. I noticed that the file size and count was drastically different between some of the folders and the DFS diagnostic report shows 100,000 backlogged transactions. However, replication appears to be working fine and I suspect the difference may be due to .tmp, .bak and .pst files. However, I don't understand why the diagnostic report shows backlogged transactions. Can you advise if this includes changes to filtered files?

Thanks

Alistair