While planning the organization of your items, remember that clutter distracts the customer and actually displays less in contains less items.

While planning the organization of your items, remember that clutter distracts the customer and actually displays less or contains less items.

【翻譯】在規劃組織你的項目時，請記住，凌亂不堪會分散顧客的注意力，而且事實上，那樣展示得更少或者包括的項目也更少。

我感覺，contains 是動詞，跟前文displays 并列，之間不可以用介詞in，而應該用并列連詞 or，才對。