Corningware for the table - but not the microwave!
Picture please. I'll show you my Centura if you show me yours
It sounds like one of the rimmed plates you have may be a later style of Centura, is it marked differently on the bottom? Someone else can fill in the details a little better but IIRC, the factory that produced Centura burned to the ground and most all of the original molds were lost. Post-fire styles were a bit different and "updated" with more square sided bowls, rimmed plates, etc. There were many, many different patterns available through the years but I've never seen a complete list.
This one at Correlle Corner is pretty good - some I've never seen in person.
Hopefully you haven't already learned the hard way but the Centura is typically not microwave safe unless it's marked on the bottom. That's about the only thing I don't like about these dishes, they still are some of my all-time favorite shapes and sizes. You'll use the luncheon plates probably as much as the other two sizes combined.
I have service for roughly 100 in the Centura Coupe (not cups and saucers, I don't need those either) When we had the vacuum convention here in '07, none of the 80 people needed a foam plate for dinner. My grandmother had the Cornflower pattern for her "good" dishes and I still have them but I've added "a few" since. I've given away as much as I have, mom has a set, John L. got a box as well as a few other friends. Rarer pieces of the set are the buffet servers, coffee pots and oddly enough, the berry & dessert bowls seem rather rare. The wide-rimmed pasta bowls are outstanding and get used constantly here but can be hard to stumble upon by chance and somewhat spendy to buy on ebay, etc. Centura is still common enough that you can find what you need pretty easily without resorting to buying from the dealers and Replacements.com though those places can be great for education about different lines, pieces, etc. I have both White Coupe and the Cornflower, as well as some odd-pattern pieces I've found here and there.
It's a sickness. Really, you can't shake this virus, just give in :-D