For example, if you type “Inset” it says Mesh (for Blender Mesh menu maybe ?).
No, it’s because it’s a mesh operator 
We know the problem of finding the tools. In Blender it’s even worse. The tool can be everywhere. And they have solved it by having it everywhere then.The double menu entries are legendary. We try to provide just one location for the tool. And try our best to sort and provide the tools in a better, more accessible and intuitive manner. This task is still work in progress. And needs more time.