For one of my KW's I've been sitting at around #35 since I got indexed. Then, I couldn't see it anywhere in the SERP for like a day like it got de-indexed. Then it came back to around #35 for a while, but tonight, it dropped down to #225, and now a few hours later it's at #151. Thing is, this is according to SERP check here http://www.whatsmyserp.com/serpcheck.php It has been pretty reliable before, but now it doesn't match the SERP I see. When I search for my KW with cleared cache, via proxy and logged out from google account, it's still around #30-40. What is going on and is it normal?