In late April, 2013, the forum software quit properly archiving posts.
Background: When a thread is inactive for 12 months, it is suppose to be locked and removed from the active forum. The posts are moved to an archive and indexed for the search engine. This procedure was set up to facilitate searches of active threads. There are some quirky side effects. Most notably, a post that is older than 12 months in an active thread cannot be found by the forum's search engine. A normal search will not find anything older that 12 months. An archive search will not find the post because it is in an active thread, thus, not yet archived.
Anyway, as mentioned above the archiving process went belly-up in the spring of 2013. I think what is happening is the posts are being moved to the archives, but are not being indexed for the search engine. Posts made between late April 2013 and 12 months ago, cannot be found by the forum's search engine. A Google site search is the best, but not efficient, way to find posts in that time frame.
Tom
