David, it looks like kgun may well have diagnosed the issue - the point now is how to support your website in the SERPS ( sorry about the pun). In situations like this you have to choose between watchful waiting and action.

Since one of your keywords needs promotion, you have to follow through with a campaign of link building with the anchor text you want.

How you do this will depend on your own preferences and skills. If you are good at writing then submit articles to the top article directories; if talking then chat into a recorder and upload to iTunes and if you can put a video together then YouTube is waiting.

Many other methods too but do what you can to build links or traffic.

You could wait for ages to Google to setle down and when it does, well, foks it's just gearing up for another dance!

It may be time to do any other website changes you were meaning to do and didn't get round to as well!

All The best

Alex