I'm not sure when, but the SLWIS site was hacked, which I noticed last night.
According to my host, it was likely due to out-of-date javascript. As I know nothing of javascript (I inherited the site templates), I decided it would be easier just to use Rapidweaver for maintaining the site. (I use Sandvox for this site, but Rapidweaver had a design more suited to SLWIS that was different from this one.) In case of future attacks, this allows me one-click publishing that can just replace everything that is there. This way, I don't need to search through files to find code that's been added. Instead, I only need to delete folders I didn't put there and change my password again. At least, that's what I hope is all that needs to be done.
Anyway, that's why the design of the site has changed because I'm using one of the templates provided with Rapidweaver.