Yes it is normal i assume because the same thing is happening to me. I am about a month and a week in and my leaves all look different. Also keep us posted on how many leaves your plant has. I just counted mine (off my one plant atm) and counted around 30. I have cut off 6 leaves in total, so i guess 36 have grown in. sounds like i have a runt, unless someone wants to say otherwise. Ill be back with pics later