I've been using scrapebox for a couple of weeks now to build back-links on a primary site and a few .info site redirected. One of my .infos shot way up to about 5000 back-links while others seem to be taking a lot longer. I'm talking 50 times as much as the others. My main site went up to nearly a thousand back-links yesterday but I noticed today it has dropped back down to a little over 800. I had nearly 200 back-links fall off. I'm still a relative newbie and could use an explanation as to why that happened.