The way it used to work originally before we released it live was that all screenshots would be entered into the game.. but what happened was that there was just a huge number of really basic shots that weren't particularly interesting to look at that kind of took away from the game. Also, yes.. we do have to manually filter out all the faces/penises that seem to randomly show up in the #screenshotsaturday stream from time to time. ;)
Right now we selectively go through the images and choose new ones to battle it out.. so there is a bit of a pre-screening process, but it's not perfect. What was your screenshot link on the site?
Also one thing to consider doing is to make sure you login or link your twitter account.. that way all your screenshots get assigned to your account here. Right now you can't manage your screenshots much, but that is going to change when we add on a indie project section to this. The indie project section will allow you to flesh out the details of what you are working on a bit more as well as link to any kickstarters, indiegogo campaigns, sales pages, game website, screenshots, videos, etc. You can also embed a personal development journal onto the page. Hopefully this works, but I also want to make it possible to allow a person posting a project to create an automated presskit using presskit() that they can download and upload to a web server of their choosing. I also want to push out your projects using RSS as well as make available an API, but there is a while to go before I'm there. If we can make it easy for gaming sites to get all your project data automatically, we can help all the indie devs out.
With the new indie project feature all your screenshots will automatically go into the screenshot showdown, which gives you a chance to become IOTD and also show up in voting.. hopefully as time goes one we can come up with really cool ways to give developers as much support as we can and show off all the amazing work people are doing.
What is the URL to the tweet you sent out? That may make it easier to track down what happened.