All they are saying about the first fire (Rodeo) is that it is manmade and there is an ongoing investigation. The fire officials are getting sick of answering the question because the investigation is not in their hands - they are working on fighting the fire. The fire started near the rodeo grounds so that's why they're calling it the Rodeo fire.
As others have said, the second fire was started by a lost female hiker who set a signal fire to get the attention of a news helicopter. Noone was prepared to put out the fire and it got out of control.
Whoever started those fires is not gonna have too many friends around here.
We have a cabin that borders the Tonto 10 mi. NE of Payson. Some a$$hole set two fires in the last two days. They were set at night and were easy to put out. They are looking for a person driving a red Nissan or Toyota pickup.