Voice memos on ipod touch

I've used voice memo many times, and just deleted memos when they were no longer needed. When I plug my iPod into my mac, and click on "iPod", dozens of old voice memos show up in "voice memos", and also in my "music library". Are they buried somewhere on my iPod? When I eject, and look at what's on my mac, they don't show up, so I'm guessing they are on the iPod. Any help would be greatly appreciated.