DFS File Hash Keeps Changing?

First some background:
2 DFS Servers running Storage Server 2008 w/ SP2
Both servers are in a replication group that replicates a folder in the namespace to both servers.
The servers are in different AD sites connected by a fast WAN connection.
The replication schedule is set to 24/7
The problem I am having is that the replication backlog never catches up. The backlog is currently at 1,900,000+ files but only from SERVER1 -> SERVER2. Replication from SERVER2 -> SERVER1 is successful with no backlog. The majority
of file changes are made on SERVER1. After troubleshooting this for a week or so trying to find out why the backlog keeps increasing I've found the following:
The file hashes on SERVER1 are different than the file hashes on SERVER2 when checked with the DFSRDIAG FILEHASH command. The hashes are different even on files with the same modified date, NTFS permissions, and size.
If I run a robocopy and copy files from SERVER1 to SERVER2 the hashes are the same.
Files I've added as recently as 3/31/2014 with no changes made since have different hashes on both servers which is causing DFS to try to replicate them even though it doesn't need to.
It seems like something is causing the file hashes to change on every single file in the replicated folder on one of the servers. I've checked the antivirus (TrendMicro) and it is supported on DFS and isn't even configured to run any scheduled scans.
I'd like to reseed SERVER2 via robocopy so the hashes are all the same again but I'm afraid that same problem will just happen again.
Does anyone have any idea why the file hashes would be changing even if the file timestamp, permissions, size, etc the same?

I've pre-staged all 4TB of files with robocopy and checked the hash on 100 or so files on both servers to make sure they are matching.
After pre-staging I recreated the replication group and replicated folder. I am currently waiting on initial sync. The backlog is currently 2,000,000+ files and hasn't gone down much at all in the past 12 hours.
SERVER1 is set as the primary and SERVER2 is showing that it is waiting to perform initial replication (Event ID 4102.
How long should the initial sync take if all of the files have been pre-seeded? I can't really tell if this is working or not.
I'm also seeing these errors in the debug logs:
20140422 09:34:59.293 8444 INCO 514 SessionTask::Step csId:{E8271D03-32D5-4A1B-89F5-35169E365CE3} csName:Corporate state:NEW_SESSION
20140422 09:34:59.293 8444 DOWN 350 LogExtendedErrorInformation Failed RpcErrorStartEnumeration (not found)
20140422 09:34:59.293 8444 DOWN 3991 [ERROR] DownstreamTransport::EstablishSession Failed on connId:{F499D9F0-3CC7-4BB0-BA6D-821B7B050CAD} csId:{E8271D03-32D5-4A1B-89F5-35169E365CE3} rgName:[removed] Error:
+ [Error:9027(0x2343) DownstreamTransport::EstablishSession downstreamtransport.cpp:3984 8444 C A failure was reported by the remote partner]
+ [Error:9051(0x235b) DownstreamTransport::EstablishSession downstreamtransport.cpp:3984 8444 C The content set is not ready]
20140422 09:34:59.293 8444 INCO 3566 InConnection::RestartSession Retrying establish contentset session. connId:{F499D9F0-3CC7-4BB0-BA6D-821B7B050CAD} csId:{E8271D03-32D5-4A1B-89F5-35169E365CE3} csName:Corporate
20140422 09:34:59.293 8444 INCO 774 [WARN] SessionTask::Step (Ignored) Failed, should have already been processed. Error:
+ [Error:9027(0x2343) InConnection::EstablishSession inconnection.cpp:3657 8444 C A failure was reported by the remote partner]
+ [Error:9027(0x2343) DownstreamTransport::EstablishSession downstreamtransport.cpp:4005 8444 C A failure was reported by the remote partner]
+ [Error:9027(0x2343) DownstreamTransport::EstablishSession downstreamtransport.cpp:3984 8444 C A failure was reported by the remote partner]
+ [Error:9051(0x235b) DownstreamTransport::EstablishSession downstreamtransport.cpp:3984 8444 C The content set is not ready]
20140422 09:34:59.293 8444 TASK 948 TaskPool::Sleep New sleeper thread inserted. Sleepers: 2
20140422 09:34:59.636 3640 CFAD 10537 Config::AdReader::Peek Subscriptions Checksum, old = 53893317, new = 53893317
20140422 09:35:00.167 1312 USNC 1319 UsnConsumer::ProcessUsnRecord Filtered USN_RECORD:

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