I agree, you can always add schools after your application is verified, but if you wait until after the semester starts to apply, it will take much longer for your app to get verified and you'd be screwed.
Don't forget to keep checking up on your waitlist status and send letters of intent to your top school to let them know they're your number one!
Get interview feedback from all your schools so you know what you need to fix on your app, do this before you submit your app to be verified, you may have worded something poorly and it stood out!