In the first match the guy didn't stack, try and pass or do anything. He just hung out there, I noticed you didn't quite have the triangle locked in the first couple of times. However, once you sunk it in deep and hooked the leg he tapped right away.
In the second match I noticed that your opponent looks rather tired, he postures up in your guard and takes a deep breath at about 3:05. He then appears to rest his head on your chest to regain some gas. (This may explain the lackluster performances on his part.)
But congradulations on racking up a couple of wins, and big props on being so active in competition. Two thumbs up.