Assuming you have two completely different topics and that you have taken care to ensure that the TOC is indeed pointing to each one independently, this should not be happening.
I'm guessing that both topics appear identical, no? And if so, it's likely difficult to tell that you are linking to the correct one. I suppose to troubleshoot, I might edit each topic to make something slightly different, yet obvious. Then compile or generate and examine the result. My own suspicion is that you will discover that even though you have two different topics, you are actually linking to only one of them from the TOC.
Helpful and Handy Links
One would think that Rick!
And it does seem the obvious mistake. I checked the properties of each TOC entry and they were each pointing to a different file. But perhaps it was just one of those things and generating the project again fixed it up.
I did originally use the one topic with two ToC entries but I now go down the snippet path and have two actual topics if I need them to appear twice.
Thanks for the reply. Your suggestion is something to look out for.