I think ironchef is right. I speak from frustrating experience: I am stuck with a 20" landlord-provided electric stove whose oven, when set at 350 degrees F, is NEVER the same temperature two times in a row. Not only that, it isn't even the same temperature at different locations within the oven! If I hadn't gone out and blown five bucks on a thermometer, I'd be up the well-known creek, because I wasn't around my grandmother long enough as a kid to absorb her method of ascertaining an oven's temperature by sticking a hand inside. Of course, if I'd had the mother wit to ASK . . . man, GBS had it right when he said that youth is wasted on the young. I am constantly amazed at how much brighter my ancestors are now than they were then.
Anyway, get thee an oven thermometer! :) (Bad cook indeed. I think not!
Let us know what happens. Also, here's hoping you join us - we're a relatively sane bunch here - most of the time - and we do have fun!!