I noticed something weird, I can snap one window but not another. Is this done purposely or is this a bug? So meaning that I can't snap two windows side by side.
What do you mean? Window snapping is definitely there in Loki (source: I'm using it right now on Chrome, snapped to full-screen).
Note that some windows have fixed, forced sizes, and therefore cannot be altered by the window manager. Thus these devices will not snap into place.