pfSense

When I go to the Status-monitoring view, and select ntp, there's a discrepancy in the scale and the "hover over" numbers.
If I hover over a point along the 500µ axis the tool tip shows an offset of 0.000522ms. This equals about 0.5µs, not 500µs as the Y axis would indicate.
Also negative offest shows as 0.00ms offset, instead of negative values. This makes the graphing show the clock as more accurate than it really is, since any negative offset would display as dead accurate no matter how far off it would be.

Also it would be nice if the really small numbers would display as µs instead of ms. its starting to be a lot of zeroes showing i.e. 0.000522ms ;)
I'm a bit uncertain of the proper category, so if I chose wrong please correct it.