Mahvet, you couldn't simply have edited all of that into one post...Why?
The most obvious answer is your gemming, OP; you're still gemming a strength bias where you should likely be gemming a haste bias. You're reforging seems like it may be off, too; get ReforgeLite and use SimCraft to find your personal stat weights. Take the weights fro SimC, plug them into RfL, click a couple of buttons, and you should be perfectly forged.
Only other likely conclusion is poor handling of your rotation, if fixing your gear doesn't solve the discrepancy.
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