Application stuck transferring to child primary distribution point

Question

I have a single application (not a package) which is refusing to distribute to one of the child primary site servers. 
Bit of background: The server was built a few days ago and all packages were prestaged and loaded onto the server successfully except for one.
- The content status for this particular package is sitting at the state of "In Progress" (Starting to process content)
- The despool component manager is continually reporting message ID 4407 (Despooler successfully receveied the compressed image for package XXXXXXX version 9.)
- The despool.log periodically reports these messages (This package's information hasn't arrived yet for this version [9]. Retry later...) followed by (Despooler failed to execute the instruction, error code = 12)
- Distribution manager component status will loop through status messages 2300, 2311 and 2301 (Beginning to process package, Successfully created or updated package and Successfully processed package)
- Distmgr.log will report that the StoredPkgVersion is 5, and the SourceVersion in the DB is 10.
I have tried
- Removing the package from DP, waiting, and then re-adding it
- Updating the distribution points (increment the version number from 9 to 10)
I recall having this issue in 2007 with standard packages, and I could fix this easily enough by updating the PkgStatus table and then refreshing the DP so it would re-download the content and work its issues out.
In 2012 it is clearly different, especially because I'm dealing with an Application and not a Package per se. 
Is there a way to fix this? (Other than deleting the package from existence and recreating it)
Is there a way to clear all previous knowledge of this application at this particular child site, allowing it to just transfer the current, latest version of the content? (similar to how one would have fixed this in 2007)
Thanks in advance!
Tim

Answer 1

Hi Jason
Thanks for the reply.
The AV product does not appear to be getting in the way.
The activity in sender.log looks healthy, I can see the CAS transferring data across to this site (and others) without error.
All other content (Update packages, regular packages and OSD images) have distributed correctly
We did turn off the "Enable this distribution point for prestaged content" feature after doing the initial prestage of all media. 
Is there a way to clear this package from a given child site so that we can distribute it down again and it ignores the older StoredPkgVersion that it has?
One thing I have noticed, before I left for the day yesterday, I deleted this package from this particular distribution point. Despite doing this, the despooler continued to loop the message ID 4407 (Despooler successfully received the compressed image for
package XXXXXXX version 9.) over and over again.
The current version of the package is 10, what this server allegedly has according to DistMgr.log is version 5.