100 search results dropped to 10

Hi,

I just checked on Google and I had over 100 results on there the other day. Now it's down to 10. Why does this happen?

Two reasons.

1) Google has already made it known that their site:domain.com search is inaccurate and there is currently no accurate way to know how many indexed pages are in Google.

2) The removal of duplicate links could also bring your number of indexed pages down.