I had nothing but problems when I cut my gasket. They will have you replace the gasket with two cork pieces if I remember correctly. Sounds like you just replaced the oil pan gasket. To be honest a little RTV in that area of the pan and you should be fine. The gasket you have will still work, assuming the oil pan gasket is a newer one.
I justed a dremel (sp?) when I cut my gasket. IF you are going to cut the metal gasket, to replace the corners with those stupid cork pieces, IMO I wouldn't do it. My car leaked still, after I added those. I wish I hadn't cut my metal oil pan gasket.