This has been happening for a while now and often the result of poor configuration within the automated tools[1]. The real issue at the moment is that there is no incentive to improve how these tools operate. Right now the onus is on Google to confirm that the links provided in the takedown notices are accurate (not doing so risks censorship of valid links, whilst you can argue a counter claim notice can be filled by the "infringing" site, they have to first be made aware that a link has been removed before any action can be taken).
The amount of takedown requests Google receives is immense and they've recently taken steps to limit the daily intake of takedown requests[2]. It's a shame services can't turn around and charge for each link submitted. Until a legal judgement is made against these types of abuses, expect these automated systems to continue.
[1] http://thenextweb.com/microsoft/2012/10/08/automated-dmca-ta...
[2] http://torrentfreak.com/anti-piracy-groups-want-google-to-li...
