Logic Problems using for loops

So I have a custom class called Championships:

 public class Championship : MonoBehaviour {
 
     [System.Serializable]
     public class Championships
     {
        public string raceName;     
        public int raceCount;     // the number of races in the championship
        public int raceIndex;     // used by the custom inspector to cycle through the races
     }

And a custom inspector/editor for this script (not the entire thing of course):

         for (int i = 0; i < championshipScript.championships.Count; i++)
         {
             // no problems here, just doing some stuff

             for (int j = 0; j < championshipScript.championships[i].raceCount;  j++)
             {
                  // retrieving some info from another script, works fine
                 championshipScript.championships[i].raceName = menuManager.menuTracks[championshipScript.championships[i].raceIndex].name;

                 // displaying that info, again works fine
                 EditorGUILayout.TextField("Race Name:", championshipScript.championships[j].raceName);

                 // cycling through the championship script, works fine?
                 if (GUILayout.Button("<"))
                 {                      
                     
                     if (championshipScript.championships[i].raceIndex > 0)
                     {
                         championshipScript.championships[i].raceIndex -= 1;
                         
                     }
                 }
 

The problem is that when cycling through the Championship class with raceIndex, the info is displayed across other Championships (see the image, highlighted area). So, a big flaw in my logic and I can't figure out the solution.The "<" and ">" buttons should change ONLY the text fields above it but they change others at the same index. Any solutions, tips, advice? I've been stuck on this for a few days now so anything at all would be greatly appreciated.