indyank - 4:05 pm on Jul 3, 2013 (gmt 0)
Hmm...you haven't stated the period for which it ranked. Was it ranking for long and dropped recently?
If their ranking was only for a few days/months, it could even be other reasons like google promoting the page to see whether users like them,attracts more links, etc. If it were not doing well against the benchmarks, they might have moved it to where it need to be.