member22, make sure you are not logged into your G* account when searching, also have the personalization turned off and search history and even cookies deleted (deleting cookies will log you out off other sites you auto logged in such as here, do this with care), when logged in of course you'll see your site first...
However, if you were logged out and still seen a glimpse of your site ranking well, then not so well minutes later, that can be due to the search results were served from either a fresher DC or an older DC, depends.
What we have into play here are three things:
- The G* dance as we used to call it, SERPS rapidly changing and served from different DCs every few minutes
- New Algo change presenting searchers with different than normal SERPs
- Old and New DCs (New infrastructure DCs) both serving results with the new DCs being updated concurrently
Re-ranking of sites as we go, some are going further down due to:
a) - Large sites with 0000s of pages being re-assessed after the re-harvest, hence probably only 10-50%+ of pages processed along with their backlink profile which means 10-50%+ of their overall power is missing and not yet available to add to the overall trustrank and authority
b)- The new algo, sites are scoring differently, assessed and measured differently, hence some of the power which was helping large sites was from backlinks, some of those backlinks are now slightly devalued or discounted, but some may be elevated but need time for the total-recall to gain back better (or worse) rank
Some are going higher up due to:
a)- Other sites have to take the place of sites being re-indexed and re-ranked, in most cases smaller and faster re-indexable sites while the infrastructure update is gathering pace
b)- New Algo update seem to prefer original onsite unique content even more than ever, large ecommerce sites for example tend to have product titles similar to other ecommerce sites, selling best selling books for example, only the author him/herself are the originals. Other 000s of ecommerce sites and their stores are unique sites, but the book they are selling is available on other 000s of sites, hence it rests on added original content to support the site. Now you might say, I sell widgets, I provide a store and a shopping cart with good design and good customer service and that's all what's needed. The new algo seems to me is saying to us, differentiation, differentiation, differentiation with plenty of innovative ways of keeping users onsite, keeping them coming back, and most importantly, keep them bokmarking us and recommending us, which ties in nicely with what we thought about this new Algo update bing powered either partly or wholly by the use of AI (Artificial Intelligence), titles and description are now only a small reliable pointer, G* decides which should come at the top mostly from users experience and this is pure AI.
Long tail SERPs +- fluctuation, site: command numbers shrinking, re-spidering, shrinking number of SERPs for well known sites, WebmasterWorld for example, funny SERPs when searching for exact match even for very long phrases (even with quotes) you get a different result at the top even though that exact phrase only exists on your site...all this is temporary IMO.
Although the new algo should be a better search experience and results for users in the long run, not much is left to be desired when half of the index is discarded at the moment and this has hurt of lot of bread winners as well as large corporations.