How to say “Yesterday's invoices were filed in the wrong binder, which explains why nobody could find them.” in Japanese

In Japanese

昨日の請求書、別のバインダーに綴じられてたんだね。だから誰も見つけられなかったのか。

Kinō no seikyūsho, betsu no baindā ni tojirareteta n da ne. Dakara dare mo mitsukerarenakatta no ka.