It was her second straight bogey.
Hurst, however, had made the first of her three straight bogeys.
"Six shots behind is nothing," Sorenstam said after closing with three straight bogeys in a round that needed 35 putts.
"After two straight bogeys, I was thinking, "Well, here we go again.
Ernie Els was as close as one shot from the lead but finished with three straight bogeys.
But Strange once again found a Waterloo at the 15th hole to start a string of four straight bogeys.
He made a double bogey and nine bogeys, five straight at one point.
Ogilvy made two straight bogeys on the back and finished with a 72 that left him one shot out of the lead.
Irwin began the round at 10-under, but he could not overcome three straight bogeys on holes 11-13 and shot 69 for 275.
After opening with consecutive pars, he made three straight bogeys and shot a two-over 37 on his first nine holes.