I should have been more clear...

On the 'continent' of Bourna, near the group of 3 lakes (which are by an inland sea). That river system is splits and empties into the sea in 3 different locations. Rivers generally don't work this way. Think of them as a tree - the upper branches start at higher elevations and converge into the larger branches and eventually the trunk as they approach the sea/ocean/lake etc.

On Tianu you have a couple of lakes that appear to have two outlets, while this is not impossible, eventually one of the outlets will become dominant and they other will 'disappear'.

Sorry for the confusion.