The lessons will remain open until around the end of August. As long as you have uploaded the required pieces for at least 7 lessons before the exam (which I see you have done), you can finish the others afterwards. They are not needed to qualify for sitting the exam, but posting the pieces when you get time, in the hope of useful feedback, will still be beneficial for your own development, and finishing the level will put you into a better position to begin the next level in due course if you decide to do so.
Classical Guitar Forum.
"Experience is something you don't get until just after you need it." - Steven Wright