I have two questions about snapping to ask you guys. Firstly, for some reason, whenever I now use snap to grid, it will snap the vertexes to the grid, but it won't bring them in line with each other, causing a problem whenever I want to duplicate or merge, or even when I just want to bring the vertexes into a straight line. Secondly, I was wondering what the hotkey is for "snap to edge?"

Thanks in advance