e-Case is notoriously not reliable. However, sponsorship approvals have been showing up.
What shows up when you try logging in with the sponsor's last name and his UCI number (from the approval letter), his DOB, etc? What about if you use your last name (as applicant) and your file number and DOB, etc?
Also, I am not aware of anyone receiving an AOR from Ottawa for step 2 yet. Either they are working very quitely behind the scenes or there is some sort of hold going on (e.g., recruiting, training, waiting for files to show up, many possibilities...)