Okay... so this was moved from Q&A to EotN Explorer's? o.O Something not quite right, methinks.
Aaanyway. The last double rep weekend was sometimes in autumn last year, and I think they only want one per year, what with the 50,000 minutes of favor it produced. So you might have to wait longer. Not 100% sure that it was a LB/SS weekend, but it was a double-rep one
Doing LB/SS runs in Sulfurous Wastes is a (relatively) fast and steady way of getting points as well as loot. I paid for Ancient Armor out of the cash gotten from maxing LB and SS.