Hi stevent,
I have the same thing on my side of eCAS-- here's what I have:
They did indeed send me an email on August 8th, letting me know that I was approved as a sponsor for my wife and that our file had been forwarded over to Singapore for processing. This came after an initial acknowledgement email on July 25th. I don't know where they got August 22 from; it's probably when somebody decided to get off their butt and update eCAS after the fact. Anyway, as PMM said, the waiting period for Singapore is quite long, so if you haven't heard anything yet, don't worry too hard. Your eCAS status implies that you've been accepted as a sponsor, and that your file is in Singapore getting shuffled from one queue to the next. To give you an idea, the first I heard back from Singapore so far is simply a change in our eCAS status, as I wrote in a post above. It's about six months from August 8 to February 5, so you're at about the point where we saw our status change.
My advice would be, hang in there for a couple more weeks to see. Sending in more evidence is always a possibility. You may want to take the opportunity to call your local MP's office, too. Call them up and explain your situation, when you submitted your application, and that you're thinking of sending additional evidence in a package to Singapore, but that you want to make sure they haven't already made a decision on your file. I did this a few weeks before I got the eCAS update, and they were able to access the notes on my file and tell me what had happened so far, that they had indeed started processing, and that I should expect some sort of communication soon. Be aware that they probably have hundreds of immigration cases to follow up with, and that there may be some delay before they get back to you. If so, ask them when you can expect an answer and call them back if they don't get back to you before then. Who knows, you might have heard back from CIC by then.
As they say in Vietnam, "co len"... don't give up!