Most probably you mined another block which contained 10 webd fees and them became again a rounded number,
OK. That makes sense. Thanks. BTW, I think it's important that 10 WEBD of default fees be fixed.
As I answered here before you can change it manually. It is set by default to 10.
I have no problem setting it myself. I just think it is a mistake to have that as the default, and a statement that fees on your network should default to so high negatively impacts the perceived value of your coin. Just trying to help the coin.
That is true, we will update this too. You can make an issue on github, if you don't have time I will make it by myself. Thank you for your support!