後あと先さきになる

expression, godan verb (-ru)

be reversed; be inverted; get mixed up; become back to front

Describes the order of things becoming reversed or jumbled, often with a nuance of confusion or disorder. Commonly used for sequences, priorities, or physical arrangements.

• 話はなしの順じゅん序じょが後あと先さきになってしまった。

  The order of the story got mixed up.

• 優ゆう先せん順じゅん位いが後あと先さきにならないように気きをつけて。

  Be careful not to get your priorities reversed.