Last week, Google webmaster tools was showing that I had more than 1K backlinks, I checked on Monday, GWT showed that I have only 48 backlinks. When I search link:xxxx.com, I get nothing, It used to show atleast 50 backlinks. However, the Average position (SERP) keep going up. My website is like 5 years old and it has been on the 2nd page for my keyword for 3 weeks now. Whats going on?