"" now if you may, was there are rule that non-member can post on a particular group thread? Is there an exception to the rule? Rules and guidelines were made to be followed so when you see someone breaking the guidelines, you push that contact button.""

ask the mods ,and use contact .yes it is repetitive and if you.

mods has access to THE WHOLE QL including all the groups nad that is one of their priveleges.

so the mods are breaking the guideline/rules here by posting in groups which the are not a member. then report the mods to the mods and we'll see.