You can check what the phone is doing by holding the ALT key and typing the LGLG keys. Maybe post the log after you've tried calling something innocuous and someone can tell you if there's really something extra going on there.
If there is an application that does this, and doesn't show under Options/Advanced Options/Appications, then wipe the device clean of the OS.
Backup the BB, wipe the device using Jl_cmdr, and reinstall the OS. If you're really paranoid, don't reinstall the backup. Sync just your contacts.