LinkWare Stats - Why does the graph show results at 275 MHz?

What may seem strange at first, are the results from 250 MHz to 275 MHz. How can this be given the limit line stops at 250 MHz?
 
The lesser side of the bar is inclusive, so this bar would be

250.0 <= x < 275.0

In other words, these are records at 250 MHz exactly, no other frequency. If it wasn't done that way, a negative margin bar from -1 to 0 would include a 0.0 data point; which would be annoying.