[solved]banners (ControllerModuleSlideshow/nivo) not working

Using latest open cart (1.5.0.5) recently installed. the slideshows that came with by default worked great. banners I added don't work. I deleted the original banners (admin/system/design/banners so I can't compare in the database or otherwise to see what the difference is.

any suggestions?

in opencart/catalog/controller/module/slideshow.php

$results = $this->model_design_banner->getBanner($this->config->get('slideshow_' . $module . '_banner_id'));

$this->config->get('slideshow_' . $module . '_banner_id') is returning a banner index that doesn't exit or match the slideshow banners I have in my database. any idea why?

workaround for now is to renumber my items in banner tables, which works.

I think I see now: I should edit the slideshow contents in slideshow module. the banners module (and system/design/banners) is another matter.