There are a lot of problems. I will start with the first one. I go to RCUniverse from the browser and not my saved link that I have used for years. On that page I click log in and it takes me to the login page. I log in. Then I click the top banner showing RCUniverse.com logo. Now on the right side of the menu bar there is a item that says my account. I click that and I get to the earlier version of the account page. The one I have always used up to now. None of the links on that page work anymore. It is as if I am getting to an account page that is no longer used. I can't explain it very well. When I logged into RCUniverse at the beginning all of the scenarios were different. I recognize almost nothing when I log in now. It appears the significant changes were made to the site recently. If I logon and to not eventually click the my account link but use the drop down menu under my user name at the top right corner, I get to an account page in which I can do very little. I find very little of the profile that I had back in January and I have no access at all to My Market setting or being able to manage my ads. It is like there is a mixture of old and new on the latest website. This explanation is the best I can do. Very few of the links I follow actually work.
There was a pretty big update around April, so that may be why the site is so unfamiliar to you now.
If you're looking for a way to organize all your listings and view them all in one page, you can do the following: In the marketplace, click on the plus (+) sign beside "Listing Type" as I have marked in red.
Within "Listing Type" you will see a box that can be checked for "My Listings", clicking this will show you all of your listings.