if loop running when it shouldn't

In my videogame the player has to copy a text using the keyboard and the game, after checking the spelling of all the characters of all the words, updates the text to be copied in real time. So I created a List containing each charater of the text to be copied and a List containing all characters the player wrote in the input field. Then I created a series of loops to compare the two Lists character by character. These loops only have to tell me if the palyer wrote the right character, the wrong character, or if a character is missing. Here's the code i'm using:

 public void ErrorCheck()
     {
         //The method FillList() is a simple for loop which takes a List<char>, a string and an int n and fills the list with all the characters of the string for a number n of characters.
         listOfInputChar = FillList(listOfInputChar, inputText.text, inputText.text.Length);
         //Comparing listOfInputChar with listOfTextChar which was filled with the text to be copied in the Start() method.
         for (int i = 0; i < inputText.text.Length; i++)
         {
             //If the i-th char is correct.
             if (listOfInputChar[i] == listOfTextChar[i])
             {
                 print("correct");
                 continue;
             }
             //If the i-th char is not correct.
             else if (listOfInputChar[i] != listOfTextChar[i])
             {
                 //Missing char.
                 if (listOfInputChar[i] == listOfTextChar[i + 1])
                 {
                     print("missing character");
                 }
                 //Wrong character.
                 else
                 {
                     print("wrong character");
                 }
             }
         }
         //This script doesn't take in account corrections in the input field yet.
     }

I call this method in Update() and the problem is this code always run the "wrong character" loop for all the characters in the listOfInputChar with index from 2 and above, even tho the characters are all right. Whould you be so kind to help me with that? Why does that happen? Thank you in advance.