Another experienced tourer who says that is just way too far back
also, why didn't you use the lower mounting holes, is the rack too close to read tire? Can't see in photoI'm not familiar with this rack, but I'm sure you could use spacers with the lower bolt hole if you need to space out the bulky rack vertical bits from the frame.
I have a surly troll with similar sloped frame, and use a tubus rear rack, specifically because others used the Logo on trolls.