I choose the word ignorant, because ignorance is basically a lack of knowledge. Once you obtain that knowledge, you are no longer ignorant on the subject.
There are MANY reasons on why you should seperate your snakes permenantly. However, I know you'll probably just disreguard this message if I start out on that so i'll start on a more pertinant matter.
When a snake regurgitates, it completely screws up the digestive tract. You need to wait at least 10 days before attempting to feed it again. In most cases, it won't take the food, but it could still take food causing yet another regurg. This will just give you a much larger problem. Since you housed them together and don't know which one is regurg'ing, wait to feed both for 10 days.
This brings you to your next problem. You have no idea which snake regurg'd. This is one of the first of a long line of potential problems you can get when keeping two snakes together. What if you find extremly runny stools? You won't know which snake that came from, WHAM! just like that double the vet bills.
Also, when you keep two snakes together, if one gets sick I can just about guarantee you the other WILL get sick. Again, WHAM! double vet bills.
What would a secondary setup cost? Maybe $50-$80 for a 29 gallon tank. $20-$30 for a 10 for the baby. Take my advice, invest the money and give your snakes seperate homes. They are not social animals. They get together to mate, and then don't see each other for another year.
Also, even thou corn snakes are not known to be cannibalistic as much as say kings or milks,for one corn to eat the other is not rare at all, I see it on forums and in chat quite often. And what usually happens is they both die in the process(specially when there both around the same size). I have some pictures of this happening, if you care to see them.
Do the responsible thing, if you're going to keep multiple snakes put them in seperate tanks, please.