For some reason ads don't display anymore unless their nonprofit ads. I did disable some ad categories yesterday (politics, religion, get rich quick schemes, etc- categories that have nothing to do with soccer), just to let you know. Could I potentially be banned from Adsense. I see no reason for this.
If something is showing up then no you are not banned. If you're getting a bunch of random stuff and ads that don't always show up it means your site doesn't have a lot of content. Try adding a paragraph or two somewhere on your site to give google some keywords to use.
Meta keyword tags are VERY effective at prodding the ads to be about something that is actually relevant to your site, especially if your site is new. Obviously, don't just make keywords up or go keyword stuffing.
May be the content of your site is not making any relevancy! other wise it displays ads since after updating first time If you are still member then contact to Adsense Support for exact help
Log in to your adsense account and see if your account is not disable, then this might due to no ads match, mean your content/keyword are not rich enough
just your keywords don't have anymore advertisement or advertisers don't want show ads with that keyword to your country (change your ip and see the differences)