Hi Achirwa,
it's always a good thing when you have communication from the VO!! I'm not sure if this means they are working on the file already, or if they are just making sure it's complete for when they start processing.
I don't know if your VO normally sends AORs, but I would definitely take it as one, as now you are certain that they do have your file. I doubt this means you will be going to the bottom, as they would date stamp your file when it was originally received.
I would think that ECAS changes to 'in process' when the VO is actively working on your file.
Have an awesome weekend yourself!