Force Sensitive Archive

After learning 6 branches of the FS skills, can you then learn more? In other words if you unlocked branches that you may not necessarily want to keep, but chose them because they fit more with the XP you currently get, can you drop them later on as long as you maintain 6 full branches all the time. I would like more combat oriented branches if I become a jedi, but my current template is heavy on senses XP, CH, scouting,and Medical. Just curious.