3/6 6-max average rake - what's wrong?

[ds914]

(Mods - I mention rakeback in this post, but I'm not looking for an affiliate, offering to be an affiliate, nor do I want this post to be seen as promoting rakeback. I'm just looking for help as to where my calculations are wrong.)

I'm trying to determine if the Empire reload is worth pursuing. I have rakeback at Eurobet, and I wonder if I would make more per hour there than with this bonus.

However, my rakeback seems to be way too high. With 8,710 hands of 3/6 6-max this month, I'm currently slated for $386.89 in rakeback (with a deal that pays 27.5%).

However, Poker Tracker is showing a total rake of just $875.50 for the month.

Obviously, I'm making a mistake somewhere, and I feel stupid for asking. But I'm stumped. Where am I screwing up? Why does my rakeback seem too high?