Hi Randy
Looks like I solved the initial problem, but I just found another issue with putting that same search in a module.
I am supposed to have three modules next to each other, all with different seblod searches.
I am using the stock #__content table, with art_catid (catid in table) in the search form as hidden field.
I managed to add an onchange to the javascript of second dropdown to set the value of category id select (jform) with getelementbyid.
This works fine, and correct GET data appears in the URL.
To get the query to do it's thing, I had to set art_catid to "exact"
I also had to hard refresh some old result pages, because the empty / incorrect results were cached
However, when I put this form in a SEBLOD Search module, and assign it to that menu item, the form never forwards me to the search page and I get no results. The current home page where the module appears is on the com_frontpage.
I checked the settings in the module, it is pointing to the menu item where the search actually works, but it just does not redirect the user there when I press submit. It also does not show an Itemid in the url, even though the menu does have an itemid.
Do you have any idea how I can fix this or why the module would not be posting to the correct menu item / page?