Hello Nayeli,
Regarding the issue with dropdown elements losing their options list (both in the submit page and the group page):
This happened because you connected the dropdown options to the dataset, but in your case you want the options to come from the static list you’ve defined in the editor.
To fix, you should open the connect panel for each dropdown, and toggle off “Connect dropdown list items”.
Regarding the issue with submit not working:
That’ll be fixed once you fix the dropdowns.
Regarding the issue with next/prev buttons not working on the group dynamic item page:
The dataset that comes with a dynamic page only exposes records which match the URL of the page. In your case there’s only one record matching each url, since their names are unique. Therefore “next” and “prev” actions are not valid and buttons connected to them are shown disabled.
Hope that’ll help you advance further with your (great! btw) site.
Good luck and let us know if you have any additional questions.