Hi, I was ranked 16th (second page) on google italy for the keyword "realizzazione siti internet" (high and competitive serach volume) on an internel landing page: http://www.spotview.it/soluzioni-web-complete/realizzazione-siti-internet.html and everything went fine, that was my strategy planed for placement of selected keyword.The same page was ranked also for more relating keyworks just few position far from the main keyword.
Now starts the strange behavior, suddenly on the end of september google.it decides to switch the landing page to the home page of the site! (absolutely not optimized for "realizzazione siti internet") and the for the others releated keyword the url disappear completely from the serp.
Checking back into my link building database I found that some guys of my staff inserted wrong new links with the exact keyword "realizzazione siti internet" pointing to the home! not so good!
those wrong links are about 10 with exact keyword and another 10 with releated keyword.
So I decided to continue inserting links pointing to the right landing page http://www.spotview.it/soluzioni-web-complete/realizzazione-siti-internet.html to balance and to let google switch back to exact url.
moreover I also tried to remove some wrong link with a little rate of succes 
Could somebody please tell me why now at about 45 day past the "landing switch error" the problem is not solved? somebody has suggestion or strategies to apply?
thanks in advance
