This is how admission at Cornell works: there are two readers. The first reader goes through your entire application, makes some notes, then circles admit/waitlist/deny/defer. The second reader then goes through the same application, with the added notes and circles admit/waitlist/deny/defer.
Then the admissions committee gathers and looks through all the applications. If both readers circled the same answer, then they generally go with that choice. If there is a discrepancy, then they spend a few minutes arguing.
There is no first pile GPA cutoff, but having low test scores can hurt your chances during their holistic review. Your SAT scores are definitely just average. Hopefully the adcoms reading your application will look past that. Good luck.