How to say “Shouldn't passport control be better signposted? Several passengers have ended up in the wrong queue.” in Japanese

In Japanese

もう何人(なんにん)も違(ちが)う列(れつ)に並(なら)んじゃってるよ。出入国審査場(しゅつにゅうこくしんさじょう)は、もっと案内表示(あんないひょうじ)が分(わ)かりやすいほうがよくない？

Mō nannin mo chigau retsu ni naranjatteru yo. Shutsunyūkoku shinsajō wa, motto annai hyōji ga wakariyasui hō ga yokunai?