I see you fixed your download link.
You've actually fallen into the third common pitfall, which is the second most common issue: Zipping a folder which contains the required folders. You need to zip the required folders directly. If you don't do this, it will place the required files in a seperate folder in the modpack files (which is what you observed).
Your current setup: Zipfile -> Modpack folder -> Required folders
Required setup: Zipfile -> Required folders
Also, good on you, no obvious illegitimate mods found, and slick-util's new for me, haven't seen that one before.