Is this Jump in Stdev/100 Possible in 1 hand?

[XChamp]

Over 20k hands at NL$200 6max my Stdev/100 has been between $150-$160. I played one hand today that bumped it up to $206/100. If I edit the hand out of my database my stdev/100 goes back to $160.

The hand in questions contains me losing $200. That's it. It's not like I lost a $1,800 hand or something ridiculous.

I am pretty sure it is a PT bug, but can someone comment on whether my strong feeling that a $45 jump in stdev/100 hands in a 20k hand database all because of one $200 loss is not correct?