Hi AtaraxiaStudios,
Yes, that's correct! Sorry for the confusion -- post has been updated to reflect the change. Though submissions are always accepted, exclusive submissions with matching are accepted until 10/31, and matching will last until a month after your work is released on the app.
Creators retain rights to their work. However, to be eligible for matching, you must remain exclusive until your contract is up (to be discussed should you pass the submission process). Otherwise, this will break the contract.
Looking forward to your submission!