Quickfix resend problems after recovering from network failure

We have seen an incident occur twice in our quickfix code where the fix engine seems to send spurious resend requests, and processes FIX messages incorrectly - including handing duplicate messages to the application.

On both occasions, this has happened following a network failure where the FIX engine seemed to behave correctly, recovering missed messages, and correctly handling the re-establishment of the proper sequence numbers. Following (what we assume) is the triggering incident things start to seem to go wrong.

I have attached a file with the full details from out log files which a walk through commentary