diff --git a/soitool/modules/code_table_base.py b/soitool/modules/code_table_base.py
index 2208608f5dacbddef6e741f8e01d877a065f274f..95ed2cf5a907c51ea562681157f82d2e87462a8e 100644
--- a/soitool/modules/code_table_base.py
+++ b/soitool/modules/code_table_base.py
@@ -205,11 +205,11 @@ class CodeTableBase(ModuleBase, QTableWidget, metaclass=Meta):
         return data
 
     @staticmethod
-    def get_user_friendly_name():
+    def get_icon():
         """Abstract method, should be implemented by derived class."""
         raise NotImplementedError
 
     @staticmethod
-    def get_icon():
+    def get_user_friendly_name():
         """Abstract method, should be implemented by derived class."""
         raise NotImplementedError
diff --git a/soitool/modules/module_authentication_board.py b/soitool/modules/module_authentication_board.py
index ffbb57fde72c10bdc8cb09668ba07d2775a6013e..f2ac91ac9c7ff1cea21e1a3b1657a80b83982c94 100644
--- a/soitool/modules/module_authentication_board.py
+++ b/soitool/modules/module_authentication_board.py
@@ -44,6 +44,9 @@ class AuthenticationBoardModule(CodeTableBase):
 
     The widget does not use more room than needed, and resizes dynamically.
     It has shortcuts for adding and removing rows.
+
+    Codes are not horizontally centered because 'BGD' is wider than 'III'
+    (example) in certain fonts.
     """
 
     def __init__(self, size=None, data=None):
diff --git a/soitool/modules/module_subtractorcodes.py b/soitool/modules/module_subtractorcodes.py
index 51898f85dbeff63be5470c0359cc343f7f1090d8..e0455033b71e52819f855ccb9211c440e55fd500 100644
--- a/soitool/modules/module_subtractorcodes.py
+++ b/soitool/modules/module_subtractorcodes.py
@@ -48,7 +48,7 @@ class SubtractorcodesModule(CodeTableBase):
                 "Invalid value for CONSTANT 'START_NO_OF_CODES': "
                 "'{}'".format(START_NO_OF_CODES)
             )
-
+        # pylint: disable=R0801
         self.start_no_of_codes = START_NO_OF_CODES
         self.code_length = CODE_LENGTH
         self.space_interval = SPACE_INTERVAL
@@ -57,7 +57,7 @@ class SubtractorcodesModule(CodeTableBase):
         self.headline = HEADLINE_TEXT
 
         CodeTableBase.__init__(self, size, data)
-        # Rwsize table when headline changes
+        # Resize table when headline changes
         self.cellChanged.connect(
             lambda: resize_table(
                 self,