Neatness counts. And those diagrams that tell you what order to put rubber bands on in? Make a difference. Even when you think it will matter.
When there are five different rubber bands on a single pin, you need to be able to pull them off in the correct order. You need to be able to find which rubber band needs to be moved next. As soon as you pull on a wrong one, you'll find out what the definition of a problem is. I'm not going to mention how much of a difference this makes when you are digging down through three rubber bands that have been looped on top of those five as part of the process of looping your bands.
To prevent this, you need to pay attention to the order you put your rubber bands on your loom. If you are always changing the order slightly, you'll have problems. Do not put the left side on first for one pattern repeat and then the right side on first for the next pattern repeat. It's gonna get ugly.
Also, you need to keep them on the pin in that order and not allow them to roll and twist about.
Neatness counts. It really does.