That is not what I'm seeing, if that is the case, call it out as sneak attack damage and sword damage in the log please, this equation stuff for sneak attack is very confusing.
All I ever see for damage in the log is "John was hit for X type damage" no matter if it's spell, enviornment, falling, all the same though it does differentiate the type, if we can't call out what the damage comes from initally then at the very least make sneak attack it's own type of damage so we know.
In the screenshot I was dual wielding so though there were just to damage numbers from different hits, you can almost see in that screenshot there was a 6 damage hit and a 2 damage hit, they are described exactly the same.