Yes, that was totally necessary.

So glad you were able to convince her!

If you want to find easy ways to keep the seed from hitting the floor, there are some no-spill feeders you can get. The one B reccommended looked really good (kinda thinking about getting that one, myself.)
http://www.amazon.com/Tidy-Bird-No-Mess ... B00YAL1N60If you're unable to buy online, you can try looking at the nearest petstore, and they might have something that serves the same purpose.
You could also try setting the food bowl in the middle of the cage floor. That way, it's less likely to fall out of the cage.
As for making sure Coco knows where the water is, you can try dipping your finger in it, and letting him lick it off. He'll see the finger go into the bowl, and make the connection, easily. You can also try simply putting the bowl in front of him for him to inspect, or just move your finger around in it enough for him to hear the water.