In WHM when our clients install FP it seemds to re-install Mail Sender for all acounts on the server. IS this a bug, feature or something we can fix with a script?

Here is a sample of the WHM result.

Frontpage 4 installer called when we really want 5 ..
Attempting to pass request to frontpage 5 installer....
Frontpage 5 installer loaded ok..
Scanning httpd.conf...X...X..X[stuff deleted ]
Removing .htaccess files
Note: Local version of Apache must use the FrontPage Apache patch.
Starting install, port: www.festivalesapac.com.

Creating web http://www.festivalesapac.com.
Chowning Content in service /.
Install completed.

Starting chown, port: 80, web: &/&.

DocumentRoot: &/home2/festival/public_html&
Searching for domains without mail extensions...
Added FP Mail for festivalesapac.com (festival)
Added FP Mail Sender for ()
Added FP Mail Sender for 8x0.com ()
Added FP Mail Sender for aarporlando.org ()
Added FP Mail Sender for aborigenebrazil.com.br ()
Added FP Mail Sender for advantagecapitalmortgage.net ()
Added FP Mail Sender for allinoneplumbing.com ()
Added FP Mail Sender for allnetcom.com.br ()
Added FP Mail Sender for artezanale.com.br ()