What is going on?

Hey guys, I made a new website about two weeks ago, I started building backlinks, and now when I open the yahoo site explorer it shows that I have 330 backlinks and 300 of them are from one blog.com different pages the funny thing is that I don`t even remember posting a single link to that blog... is the blog owner trying to sandbox me or what is going on? Thanks.

Its happened to me once, i blasted a list with scrapebox, and i have posted at one blog im not gonna name it and i got indexed by yahoo with 1.3k backlinks before that i had 350 or so, it was like when you are added in a blogroll of someones site, and i checked what it could be, it was a some kind of a plugin with some recent comments and it was shown in every page, seems logic doesnt it, and i was right, i was in a recent comment on every page and my link was indexed by yahoo and on google with 2 backlinks from that site, and then they are slowly disaperead with time.