I got an email confirmation saying form was submitted but no offer through and online it just says 'not submitted in this round'...slightly panicking!
Did your local authority ask you for more information and you might not have replied? I was asked by email to provide my tenancy agreement as they couldnt find me on the council tax list based on my post code, which is very odd. They mentioned if I had not got back to them by certain date, my application would have become void.
Definitely contact the council and find out what is going on. Hopefully, it's just a technical error.