topicref in reltable but not in ditamap

I'm using DITA-FMx 1.00.21, XMetal 5 and the DITA-OT1.3.1.

I've got a ditamap with 3 topicrefs:

- topic A
- topic B [1]
- topic C

My reltable looks like this:

- topic A links to topic B [2]
- topic A links to topic C

I then delete the topicref to topic B in my ditamap [1], but not the link from A to B in the reltable [2] (I may forget to do this in "real life").

I generate chm and xhtml output and I notice that topic B is still there (probably because I still had my topicref to topic B in my reltable). Is this the normal behavior of the OT? I'd expect that the deleted topic and references to this topic would not be in my output. Or should the editors (DITA-FMx, XMetal, ...) check this and give me some kind of "unresolved related links warning"?
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