That is honestly true, how many graduates have their valid "General-IELTS" not many. Many will be trying to get bookings for a test, get their completion letters etc. Also you need to be employed currently, atleast for the student graduate streams.I honestly feel like they wouldn't mention a November cut-off if it was something that is gone within a few minutes. They could just say "will open May 6 until quota is met". Don't stress out let's just be ready on May 6 and carefully fill out the application.
Time will tell.