Rampage's GCD scales with haste if you have enough of it. It just scales as if it had a base GCD of 2s instead of 1.5s. Its GCD will be MIN(1.5, 2/(1+haste%)). So under 33.33% haste, its GCD is 1.5s. Over 33.33%, it starts to be reduced. A 1.222s rampage GCD would be expected for 63.66% haste. A regular GCD would be .9165s at that haste, which you can see is the GCD between your other abilities under BL. That means you've got 25.89% haste without BL, so you'll see 1.5s rampages again in the sequence table as soon as BL falls off.