Pick Many Question Will Only Pick One

I've created a Pick Many question and selected the two correct answer choices. When I Preview and when I Publish, the slide will only allow me to select one of the choices, thus getting the question wrong.

What in the world am I not doing correctly? Please help!

[View:http://community.articulate.com/cfs-file.ashx/__key/CommunityServer.Discussions.Components.Files/65/8132.Pic1.pdf:650:0][View:http://community.articulate.com/cfs-file.ashx/__key/CommunityServer.Discussions.Components.Files/65/0363.Pic2.pdf:650:0]

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