Q&A user can access Questions tab from WP dashboard and view/delete/edit all questions

I have set up Subscribers Capabilities to View/Ask Questions and View/Add answers only. Unfortunately user (subscriber) can log into WP Dashboard and able to view Questions tab there with all the options normally available to administrator except Settings link. Then the user can click on a questions and gets the following options available under each question:
Edit | Quick Edit | Trash | View

Basically anyone can delete/edit questions.

I read all previous threads in the forum, tried to deactivate/activate the plugin, also tried to deactivate all the rest of plugins that I have installed, but did not work - the same problem.

I can post screen shots if required, but believe here is sufficient details to understand the issue.