Hey! Yes, you have actually violated the rules! ^^ I thought I've send you and email but it might not have come across. All submissions made on CAS have to be made within the time frame that is chosen, I'll copy the mail I've sent here:
Hi
I'm sorry but I had to remove your latest submission to Concept Art Session from the website as you've said it was not finished in time. I hope you understand!
In the future we're planning to implement a "failed" section of sessions where your submission will go when it is not finished in time :)- Me, via email
For now though, you can always start a sketchbook thread in the
Sketchbook forum and upload your piece there!