Having the same problem here too.
Applied online July 3rd, and received the "submitted" message a day later. Then on July 9th I received an email with a supposed update, but nothing was different.
This morning I decided to check myCIC after checking my email (like every day lately..) and I was apparently approved with no email update. Hope I get it in the mail now and this isn't some fluke.
Hah, the other day I talked to an agent at the call centre. The person working said there was no "extension of visitor record" (only study and work visas) and that she couldn't access any information since it would be outside Canada.... what. I decided to not challenge her notion when she continued to deny being able to do anything and just said "Alright then, have a nice day". I don't know if there was some glaring miscommunication, or the fact it was nearing 4pm.