Having an illegal routing probably explains the lack of a ticket number. Probably the agent is trying to convince the ticketing authority to allow this routing; strictly speaking it is not allowed in the rules unless they back-date the ticket issue to be 2 days before you "commenced ticketing". Obviously that is fraudulent but perhaps normal practice in CMB. You may have problems with any reissue catching the rule violation if the original issue date is after August 15, usually this is checked fairly thoroughly on reissues (presuming that the ticket will be issued at all for this routing).

As to your question of how long it takes, all OWE tickets that I have purchased were complete in less than 24 hours. However CMB may have limited ticketing facilities (I have no idea on whose stock they issue the ticket).