You are correct. BHB is not being renewed (as well as other daytime shows on TLC). TLC plans on putting all their effort in their primetime lineup. Apparently they're not interested in the viewers who watch their daytime shows.
I'm in the know because I know people over there. It stinks because a lot of people enjoy these shows. I don't know what can be done besides a letter writing campaign.
That makes me REALLY sad. SO many of my friends are watching it and learning from it. What harm would one more season do to make those of us who watch daytime shows while nursing more happy?