Hey Arny,
First, do you understand the use of anchors? It's only really necessary for long posts.
If you followed his steps
exactly, you should have no problems using it. BBCode shouldn't conflict with anything as it's parsed separately.
Go back over his tutorial and read it step-by-step and see if you implemented it correctly, then try and use it.
I see nothing wrong with this code as it's just using href's to denote parts of the post.
Off-topic: It's a nice little piece of code, I might need to use this myself