I was finally able to get a case opened and Meraki acknowledged that there is a bug in MX67W firmware 17.x whereas wireless clients are bypassing several security features. Their workaround was to create a new group policy and organize your wireless clients into that policy, however, that has not worked for me. Awaiting a fix from Meraki and have an open support case. This is a major bug in the security appliance, and I would hope they would get a fix for this soon!