The "other three" does NOT refer to other 3 SS agents, but to the Chilean Pres, his wife & Laura. Bush was with them, then he left them to go back.
" Bush noticed the fracas after posing for pictures on a red carpet with the summit host, Chilean President Ricardo Lagos and his wife and first lady Laura Bush.
Abandoning the other three, Bush walked over to the agents, reached through the dispute and pulled his agent from the scrum."
You're right, I corrected myself earlier, see post 779:)