Energy Charge doesn't really give accuracy?

So as you all know, Energy Charge supposedly gives up to 20 accuracy when activated. Yet it doesn't actually seem to be implemented, at least in my experience.

According to screaming statue's accuracy calculator, I hit Elder Wraiths 80.7% of the time without any buffs, and with Energy Charge, I hit them 100% of the time. Here's my stats if you need them:

 level 91, 146 accuracy

So according to this data, I should miss them without Energy Charge, but hit them with it, right? Well I miss them without Charge, as predicted.

 without Energy Charge

...But I still miss them with Energy Charge!

 with Energy Charge

It really seems to me like the same 80% hit rate as without Energy Charge. Has anyone else noticed this glitch of sorts?