I was playing in a single star medium sized map, and deployed trade post on all of my planets.  I have 4 planets linked by trade networks over the star, they postioned themselves about 18 degrees to each other with a asteroid without the trade post in the middle, and it worked perfect fine, but another two planets on the opposite side of the star wasn't linked.  All the 6 planets should be linked since they are all basically connected by the star.   What happened?  

Phase lane linked with trade route -,  /

Phase lane not linked with trade route x

All Planets have trade post, asteroid doesn't have trade post

A---B x asteroid x C---D

   \   \                 /    /

              Star

           X       X

            E----F

P.S. I am playing with the newest patch 1.905 or something like that.