@Jay ******
Visa-exempt entries go back to 30 days on Sept 15th, I believe. I'm not sure if the policy of 7 days for a second-time extension applies only, or primarily, to land entries or also to air entries. As you can see, and many other responders have pointed out, information and advice varies widely. The only 'correct' answer for your situation will come from the Immigration Officer you speak with when you apply for your extension.