SERP differs for different "results per page" in google

very weird ranking in google

[stevegpan2]

SERP very different if you set different "results per page" in google preference.

For a 2 word search term, when I set "100 results per page" setting, see one of my sites listed at 49.

when I set "20 results per page" setting", it's gone from the first 200

Why?

[DerekH]

Because when two or more results on the same window come from the same domain, Google will fold the second and subsequent results into the first, and indent them underneath.

At 10 results per page, site "MYSITE" could appear at positions 1,11,21,31,41,51,61,71,81,91

At 100 results per page, MYSITE will appear at positions 1 and (indented) 2 - with a "more results from..." qualifier.

This frees up 8 more SERPS locations for other sites.

Across a typical set of SERPS, several dozen extra entries are possible.
DerekH