I purchased a mini U-lock today, and it's really short. I mean, I know it was mini, but it's proving to be problematic to the bike-parking areas of my dorm building. As a result, when it came to locking my rear wheel to an object so no one could carry and pick it up away, the u-lock couldn't go through both sides of the frame of the wheel and through the object. I was only able to go through one side of the frame, and then to the object. Here is a picture of it:
Is this still okay? Because a thief would still need to put in the same effort to break the U-lock to steal my bike, right? I don't see why this would be an issue, but since I'm a newbie to bikes I don't completely trust my judgement. Please give input!!