Limit to the number of convention tickets you can purchase?

[mickeyhereicome]

My husband will be attending a conference in May at WDW. He can purchase tickets at a discount through the convention link that is an actual Disney site. It says tickets for attendee and guests. Does anyone know if they limit you? My sister's family will be joining us so we will be a party of 11. It seems like the site will allow me to purchase 11 passes but I haven't pulled the trigger yet.