Issue getting release dates, possible bug in the API

Hello,

I am attempting to get release dates for games, requesting the following:

http://www.giantbomb.com/api/releases?api_key=API_KEY&format=json&filter=expected_release_month:7,expected_release_year:2015

The following I expect release dates for July 2015. But I end up with dates for 2008...

Ontop of this there is no logical way to have a /Game id and then use that GameId to lookup a release.

Can anyone assist? I need to lookup all release dates from a month and then correlate that with a /game