I tend to check my search engine positions once a day.

But I've been checking Yahoo more frequently in the last ten days and have noticed that they seem to serve up three different sets of results at different times of the days.

It's not just for one search term and one site either. Six or seven different sites will appear either top, fifth or tenth position, for all sites at the same time - it appears that there are three different sets of results appearing at different times.

The times they change seem to differ most days.

This is via yahoo.com from the UK.

Is this because Yahoo is updating, or fairly 'normal'?

I don't know, but came across this funny search on Google from one of the posters at Google Groups that I moderate.

It shows yahoo listings within Google's search.

http://www.google.com/search?q=therapy+ … S:official

That's odd...never seen that before.