I am not 100% too sure whether to class this as a bug or not.
I just noticed that I currently have 1,104 reputation on SO.
my Reputation increased after refreshing to 1,119, after examining my reputation history:
It does not list what caused the increase on my reputation.
then after looking at my reputation again it has decreased to 1,104
Could this be a bug? or a glitch within the system? or should be ignored?