Hi,
I was not able to reproduce the issue with the repeater buttons. I have used portal engine templates. What kind of templates are you using (portal/ASPX)?
What are the settings of the web part? If you can post here some screen shots it will be helpful. Also, a detailed description of steps to reproduce the issue. What changes you have made to the UI so far? Thank you.
Regarding e-commerce. This is default behavior and departments are mandatory, you have to have at least one, it is the same like for payment or shipping methods. They are also mandatory. It might be confusing that there is no warning or something similar, but it should be obvious that you need these parts of the store to have this module working correctly. You can find more in our
E-commerce guide.
Best Regards,
Juraj Ondrus