Thanks for the look...you are using the combo classic template with 2 stylesheets, this I have not mastered, and for other reasons is not the suggested method to use for the future path.
I see that you have not created a custom plate and therefore much of your edits are to core files. These will be overwritten in any upgrade to the Zen Cart application that you make and 1.3.5 is currently available.
Not on subject, but to save you future grief, I suggest that you first make local copies of all the files that you have edited. Look to the date stamp on the files on your host as the ones that you have changed will have a later date than most. Keep these in the zen structure on your machine.
Create a custom template even if identical to the one that you are using so that all of these files can be in their own folders named for your template. This is to preserve all of your edits when you eventually do an upgrade.
I would base this template on the template default files(not the classic files), and this will correct and ease styling for many issues.
Once you have a custom template and your edited files in their respective folders, you can consider upgrading to 1.3.5 and be prepared for the great things that are coming, without having to fully redesign.
Sorry for going on about this but it is very important to the futue of your shop.