Another narration by al-Bukhari has:

"It was regarded as one divorce."

وَفِي رِوَايَةٍ أُخْرَى لِلْبُخَارِيِّ : { وَحُسِبَتْ عَلَيْهِ تَطْلِيقَةً } [1]‏ .‏