K's vs miles

Ok I just can't run 3 miles it has to be 3.1 to make it a 5 K.  so today I couldn't just run 6 miles.  I had to run 6.2 to make it a 10K. Is that crazy?  Ok so a year ago I would never say this. But usually Mondays are my recovery days and I only do a swim.  But since I "only" ran 6.2 miles today I don't really need a recovery so I am going to do my usual morning wokout.  45 minute bike, 30 minutes on the elliptical and 30 minute swim.  And since it is 8:30 I am off to bed.  :)