Steve, it's not the forum software that's doing it, but rather a third-party service. It's supposed to learn what is and isn't spam. Theoretically, every time we restore one of your deleted posts (you're welcome) it's supposed to figure out that they should be exempted from whatever rule it had applied to them.
The pattern I see emerging is that when you have a post that's very short, such that 90% of the post consists of a link to another URL, Aksimet sees that as possible spam. And in reality, a lot of spam posts do fit that pattern.
I haven't seen any of your posts disappear recently, so I'm assuming Aksimet has finally figured out that we consider your CHB link to be OK. The same thing had been happening a lot in the Software forum, where users often make short posts that sometimes consist of one sentence followed by a link. We're seeing far fewer of those automatic deletions there now.