As TimberWolf said, there are mobs can reflect projectiles. These ability doesn’t show on the banner. I know two types of mobs do that. They are not range attacker and they can be white mobs.
In addition, projectile doesn’t restrict to “impale” and DH. All classes have some kinds of projectile skills.
I didn’t say that you are a “noob”. And I don’t think “noob” is bad.
I just told you to be more specific. “(insert monster with no ranged attacks here)” is useless in a bug report. It doesn’t give any information. Please read the pinned post How to Write a Good Bug Report - #3