What do you mean the two on the left are long and the one on the right is short?

It's not superstition, it's just mental effect. There is a "twenty-four incense spectrum", which simply means different arrangements of burning incense, including long and short, short and long,,,, and different meanings. At the beginning, you should insert three incense sticks at the same height, and when you burn them halfway, you can see which combination you are giving. From your point of view, this is divination. If the incense is inserted into a certain combination, it is prayer.