How to say “Yesterday we mixed up two orders in the pizza dispatch room; let's keep each receipt with its bag tonight.” in Japanese

In Japanese

昨日(きのう)、配達準備室(はいたつじゅんびしつ)で二件(にけん)の注文(ちゅうもん)を取(と)り違(ちが)えたから、今夜(こんや)は伝票(でんぴょう)をそれぞれの袋(ふくろ)につけておこう。

Kinō, haitatsu junbishitsu de niken no chūmon o torichigaeta kara, kon'ya wa denpyō o sorezore no fukuro ni tsukete okō.