Yeah that happened to my clone too wanted to know why myself. I found that if you take a clone and slice the stem in the center near your cut it will do this 1/10 times and split into two just like yours. Be careful, you can lose a lot of cuttings this way too!
My plants looks like that too, they are all clones. Two are funny looking like your pics and the other two look normal. All of them seem to be fine though.