I'm not sure if this is worthy of it's own thread or not, so I guess I'll post it here... maybe everyone already knows about this and I'm late to the party anyway, haha.
If you make changes to your song you might notice that the changes don't show up when you listen to your submission. This is because of your browser's cache. It can be annoying if you don't know why the newer versions of your songs aren't playing. All you have to do is clear your browser's cache and the new version will appear. However, it can get annoying, having to clear your entire cache history every time you update your tracks. Well I found a relatively quick and painless way to do it if you use Google chrome!
When you update your track go to your submission page. Press F12 and click on the gear icon in the top right corner of the chrome devtools menu that pops up. Then under general settings, check the box that says "disable cache". After that, refresh the page with the devtool menu still open, then uncheck the disable cache box. Now close the devtools menu and refresh the page. The updated version of your song should play.
It sounds kinda confusing but once you know how to do it, it makes the process of clearing your cache go a lot faster. And best of all, it only clears the cache for that one page (or website) in case you'd prefer NOT to clear your entire browser's cache. I'm not sure if there are similar methods for other browsers but I'm sure there might be.
Just thought I'd share! =P