I have four plants that i am growing from seed and one of them has 3 stems. Never seen this before. I topped them at the fourth stem level and it resumed growing with only two stems with one much thicker than the other and has grown twice as fast as the other. After about 3 weeks, i noticed the thicker stem has started to grow into two stems. It is like the two stems joined together after the topping and are now splitting on their own to become a three stem plant again. Any idea what is going on? I can't find anything on the internet and people I've spoken to has never heard of this before.