Dat DOAN

Hello everyone, I am currently setting up a mike hydro basin for Vu Gia - Thu Bon basin in Vietnam. During setup process, I want to create a bifurcation node at the end of a branch (on the left of the photo) which would separate the flow into two distributary branches (at the top and bottom of the photo). Unfortunately, I cannot create 2 branch connections at the same node at the upstream to different two nodes at the downstream, it is just only one connection created. Can anyone help me, I appreciate that. Thank you very much.