Hey @JulianSMoore,
The increments themselves have no real meaning here, it’s just some intervals that are visually displayed, but you still have every other iteration between it.
Be mindful also that the gradients include both training and validation (something we do need to change) meaning that it would cover 135 rows per training epoch.
I’m a little surprised why the last value is 13485 rather than 13500 though.
For the other issue: it certainly looks like the Max and Average is swapped, although for some reason that’s not reproduced in all cases 
Added it as a bug we will look into, thanks for highlighting it! 