I get the same results with Studio2. I only have the First Topic topic in my project so far (default.htm) - no other topics yet. I used the Index and Glossary as shown in your image to set them up.
... but have you set up any Index entries or glossary terms. Selection those items only includes them if you have set up an index and/or glossary. If you select them in the preset but haven't set them up, then RoboHelp has the sense not to include the tab.
Here I have selected both options but as I haven't set up any glossary terms, RoboHelp is not including the tab.

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My site www.grainge.org includes many free Authoring and RoboHelp resources that may be of help.
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