All statistics displayed by per-second are understated by a factor of 1000. Stats are displayed correctly for per-sample.
Remember to mentally move the decimal point 3 places when examining these stats. Alternatively, use the "Scale" feature in the upper-right corner of the graph to reset the scale to 1000. You'll have to manually type in "1000" as the up-down arrows only use powers of 2.
Last updated: 2/9/15