If Ted Bundy received three death sentences which murder was he actually executed for?

Technically, Bundy was executed for his last murder, 12 year old Kimberly Leach. He would still have had to face the two counts of murder for the sorority girls at U of FL. But the road to execution is a long and arduous one. There are mandatory appeals that must be played out before a DOE (date of execution) can be set. It was probably just a temporary holdup of the other appeals that caused Bundy to be executed for his last murder.