Agreed, most leagues will have a larger spread between top and bottom, but these tight ones can be a whole lot of fun. Looks like you've found a good group of owners.
Being in the lead while only leading in two categories isn't all that rare, particularly in competitive leagues. I'm in the same situation in my 5x5.
The second team's HR-RBI split might be a bit unusual...
Good luck hanging on to the lead! (Maybe deal a closer for a bat?)