As for the disappearing posts, it is really difficult to fix this one as there have been various reasons for it over time. The forum issues post gives some tips about the different things you might try to alleviate this problem. Have you read this and tried these fixes?
I can't really tell you when the post count problems will be fixed. We are in the midst of doing major development on the website right now and as much as we would like to have all be perfect with the forum, this issue is a minor one. I'm afraid that development will take priority over the post count issues.
I'm really sorry to hear how frustrated you are about this but we have one team working on all the issues around our website. They must prioritise to ensure that everything gets done.