one account apart from one account, it means to separate one event from another instead of combining them together
Definitions (粵典–words.hk)
語句
將兩件事分開嚟講或者分開嚟處理 to treat two things separately; to argue that two things should be treated separately; literally: one sum belongs to one sum
嗱,你一筆還一筆,貪污還貪污,外遇還外遇,唔好將兩樣嘢撈埋嚟講。
嗱,你一笔还一笔,贪污还贪污,外遇还外遇,唔好将两样嘢捞埋嚟讲。
naa4, nei5 jat1 bat1 waan4 jat1 bat1, taam1 wu1 waan4 taam1 wu4, ngoi6 jyu6 waan4 ngoi6 jyu6, m4 hou2 zoeng1 loeng5 joeng6 je5 lou1 maai4 lai4 gong2. Hey one thing after another another, corruption is one thing, and affair is another, don't mix them up.