Thanks for the help, you pointed me in the right direction to solving this. I had already tried disabling the maintenance mode plugin – this was my first guess as to the problem. This was not the problem.
Since, the site is still being built, I hadn’t installed a caching plugin yet. But after you said that, I checked the plugins and there was a cache plugin bundled with the theme that was installed. And you are correct – it has options to minify the CSS and JS. I deactivated both of those options and now everything looks to be working (even with maintance mode on).
Thank you for your help and your offer to log in and fix it, but it is not needed at this time. The cache plugin was causing the problem. Thank you for the fastest and most helpful support in WordPress.