Open iTunes. Under Playlists, scroll to the bottom to Voice Memos. Uncheck the ones that you don't want to see. Or if you don't want to sync any Voice Memos, uncheck the Sync Voice Memos box when your iPhone is plugged in.
Bottom line is make sure that those VMs are deleted on device and in iTunes via unchecking all boxes that apply.
FYI, you don't need to bump a post every few minutes. Someone will show up.