Non-round through hole issues for Micro USB
If your board house supports internal routing, you can use a 'wire' on layer 46 (milling) to make oblong holes. Basically set the width to 0 (or some small number) and draw the shape using the wire command. Another thing you can do is to create the oblong hole using overlapping drills spaced a distance apart (basically offset). That is the reason why some board houses disallow "overlapping drills", so you will have to check with your board house.