question about Splines and BSP

Q1 : my map has a BSP that i can select on screen but it wont appear in the Scene outliner bar , and doesnt has the opinion to rotate/scale/move ,
and i cant use Delete in the edit , can anyone help?

p.s. i already builded

Q2 : I use spline tool to make my river , but after i put in a mesh with water surface material , theres a line between each meshs , how can i fix it? (this is the line i mean)

thanks a lot for answering!