Heck ya bro looking good I would not worry about size diff mine were like that and all of them caught right back up with each other besides my mutant week 5 now and it's 27 1/2 inches tall and flowering all over all my others are starting to go into full flower now also but not like this guy.
It came in as a free b, with 2 others they were in little kind of like ziplock bags but what I ordered came in a sealed nirvana package. Anyway best of luck.
I think if you mess with the light schedule it could make them hermies, but I've changed mine 5 times already and they just took off. As for the soil I'm using fox farm and their nutes from day one and they are doing very well.
ive got a couple autos and mine have just know started to grow pistols all over. All started at the same time and 2 of them are growing out of control over 20 inches at 4 weeks old. Not really sure what is wrong with them the biggest one is a mutant and it has pistols all over. This is my first...