Here is my .02 cents worth. If this strain is and F1 hybrid (and it sounds like it is), I have read that F1's do not do well when cloned because they lose thier F1 vigor. The issue you will see is a decline in yeilds as you continue to clone a F1 plant, this will also happen if you re-veg an F1 after flowering. Next time maybe do some of the plants from seed and use the clones you have and see if there is a difference. I havent done a ton of research on the subject, just enough to know a little. I prefer to grow something different each time, so I always start with F1 seeds.
Good luck and let me know how it goes: Stlmatt