From my understanding, the Summer class which starts in May 2018 is the one with the 8/15 deadline. The Spring class deadline was back in June. Do you mean you would apply for the next cycle which is the Fall class with the October deadline?
I am applying to the San Marcos campus! Ideally, I wanted to start in the Fall and apply by the October deadline but the Fall class is always the most competitive since that's the semester they receive the most applications from what the counselors were saying. I'm just trying to maximize my chances so I started my application a month ago and have quickly tried to submit everything for the 8/15 deadline. I'm undergrad cum GPA isn't the best so I figured maybe applying for the Summer class would help me out. It's definitely been stressful
I have all my documents submitted, I'm just having one more OT review my personal statement before I submit my application but I'm definitely cutting it close.