My site is always in and out of the listings due to scrapebox blasts. It will be out for a few weeks, then show up for a day, out for another few week, back for a day (usually higher). I have a very competitive keyword so need to continuously build links but I don't think my site position will settle down if I keep doing this. Also because of this, I have no idea if I've been affected by Panda or not (some dupe content on the site). Anyone have a similar experience and figure out what to do?