Cynthia Woods Mitchell Pavilion

Hi, has anybody had any experiences buying resale tickets to see a show at Cynthia Woods Mitchell Pavilion? I bought a resale ticket for an upcoming show and am now worried it's not going to be accepted. On their website they say they only accept tickets through ticketmaster so I wanted to see if anyone has had any troubles with a ticket they purchased through seatgeek, vivid tickets, stubhub, etc? Thanks!