Hbehmane jan, I think what you are looking at your e-cas is the part under the "Sponsorship Application", especially that it mentions they sent a letter regarding their decision a few days after they started processing. This section is for the Mississauga part and it should already be "Decision Made". Since you already had the Sponsorship approval I feel it's strange they are going back updating the date they started processing.
The part which is for the local visa office, in our case Ankara, is under the "Permanent Resident Application", now this will either be "Application Received" or "In process".
Either way it is good that they are updating e-cas, maybe it is a result of that survey we all filled saying how useless e-cas is, so they decided to make it a bit useful!