I'm not sure what happened but when I checked my website today, the customization I made (font, font size, etc) were lost and showed the default theme settings.
The background color remained though.
When I tried uploading the theme files to my server, it says that the files on the server are newer than my local copy. I did not overwrite it so I was able to retrieve the customization I did.
Why does this happen and is there a solution to this?