If you're connected and downloading, you won't get kicked off when you reach your cap. If you go over your cap you'll just find that you won't be able to connect the next time (assuming you've chosen the disconnect me option).
As you don't get kicked off, you can download as much as you want over the last 24-48 hours provided you don't disconnect from the internet.
Also, make sure to disconnect just before midnight on your last day to make sure all downloads are left behind in the previous month |