Hi LCecil,
please, enable debug logging in GUI, restart outlook. Recieve any email which is marked as spam and is not moved to junk and send me c:\programdata\avast software\avast\log\asoutext.log. (If you have 64-bit outlook, send asoutext64.log.)
Do you know which account type do you use? Imap, pop, exchange?
Thanks,
pm