Radiobutton is loose on form

I got a project and the screen has 3 radiobuttons. I needed to add a room. I went into the component palette and gave two clicks. Making the appropriate changes, such as caption, position I circled the program and when I click on one of the three that were already, it unchecks what is marked, but when I click on that new one, it does not unmark anyone and nobody unchecks it, as if it was loose on the form. How do I do this? I've been copying an existing one, it tells me that a component with that name already exists. Rename and gives error that already exists a procedure with the same name, in other words, I do not know VB. I'm lost without knowing what to do.