BT DB Config Flags

Hello all,

I am going through my cor****ate databases and noticed that certain flags
for 
our BizTalk 2006 database are set against MS Best Practices.  Can any
BizTalk 
Admins out there tell me if these settings are "BizTalk behavior by
design" 
or if someone's been messing around with settings?

BizTalkMsgBoxdb - Auto Create Statistics Flag = False
BizTalkMsgBoxdb - Auto Update Statistics Flag = False
BAMAlertsNSMain - DB Chaining Flag = True
BAMAlertsApplication - DB Chaining Flag = True

Thanks in advance?

- SB