Bug or by design? on High Availability Bckup and restore

Hi, I have two identical machines and am trying to get backup and restore working.
Everything seems to work except for dahdi settings. The machines both have
two T1 cards from rhino and one FXO card from sangoma. They have been installed with the same exact drivers too.
When i do the backup and restore the dahdi settings dont get copied and i have to do this by hand. Is this on purpse since some of those settings are at a lower level (like modprobe.conf and require dahdi to be stopped to be replaced)
or this just a bug I should report?
PS: I use

PBX in a Flash Version =
FreePBX Version =
Running Asterisk Version = Asterisk
Asterisk Source Version =
Dahdi Source Version = 2.4.1+2.4.1
Libpri Source Version =
Operating System = CentOS release 5.5 (Final)
Kernel Version = 2.6.18-194.26.1.el5 - 32 Bit