Those clones appear to have been taken from a flowering plant. That's a major pain in the ass. IMHO, if a grower is selling clones to co-ops, he really needs to state whether they were taken in flower and as a result will need 3-5 weeks to re-veg before flowering. I'd be upset if I bought clones expecting to 'flip' them within the week, and they turned out to be in flower. Grrr.
To get branches, pinch the tip. Do not flower for 3 weeks after pinching. That plant also looks like it's sitting in cold, wet soil by the red stem and leaf shapes. There's a form at the top of the problems section, fill it out and post the results here so we can make sure you don't have any more issues.