I've drilled 3 6mm holes in a wall, about 30cm away from each other. They were meant to be vertically aligned but the measurements were off and it's on about a 5-10 degree slant. Because of this I need to start again (or mostly start again).
I had initially thought that I could keep the top hole, and just drill 2 more underneath but I think that the relatively short distance combined with the relatively small angle mean that this hole will be too close to the existing one and it will end up as one wide hole.
Is there a recommended distance between holes in plaster (either officially or anecdotally) so that, if I do start again completely, I can keep the holes as close to their original locations as possible.
Alternatively, is there a filler I can use (bought off the shelf) to fill these holes that would make them blend in with the existing wall (which I assume is plasterboard) and I could drill wherever I needed to?
Edit (in response to comments): The holes are being drilled to put some mounts for shelves up. The fasteners are just standard wall-plugs (that expand when a screw is inserted to wedge them in place)