Sharepoint 2013 active directory security groups authentication ot working

Hi,

I recently upgrated from Sharepoint 2010 to Shaarepoint 2013 adn every things seems to be working fine until

noticed that all users are only able to see workflows created before upgrade an those created by them.

Permissions ar controlled by acticve directory security groups. I have changed to permission to full access bactiut nothing doing. Users with with administrator rights can view all items. The groups imported from active directory look I think a bit strange,

Account c:0+.w|s-1-5-21-1878169019-4256750899-1348333825-5685

Name xxxx\yyyy - group blabla

Account should be the same as Name, the same thing goes for Sharepoint groups. This is happens only fornew imported active directory groups and new Sharepoint groups.

any ides?

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