Don't panic, Google just seems to be going through through adjustments in their algorithm at the moment. When these updates are in process, the index is a mess.

And btw, anything you read on a forum called Black Hat SEO can't be trusted. If you implement any of their advice, you'll just end up in hot water with search engines. Most of their information is going to be based on the newest and best tricks, stuff that in six months will get you thrown out of Google.

Michael