This is conflicting with the settings in ultralcd.h. Not sure why it' s redefined here anyway.

Marlin/ultralcd_implementation_hitachi_HD44780.h

     #define BLEN_REPRAPWORLD_KEYPAD_DOWN 6
     #define BLEN_REPRAPWORLD_KEYPAD_LEFT 7
     
-    #define REPRAPWORLD_BTN_OFFSET 3 // bit offset into buttons for shift register values
+    #define REPRAPWORLD_BTN_OFFSET 0 // bit offset into buttons for shift register values
 
     #define EN_REPRAPWORLD_KEYPAD_F3 BIT((BLEN_REPRAPWORLD_KEYPAD_F3+REPRAPWORLD_BTN_OFFSET))
     #define EN_REPRAPWORLD_KEYPAD_F2 BIT((BLEN_REPRAPWORLD_KEYPAD_F2+REPRAPWORLD_BTN_OFFSET))
     #define EN_REPRAPWORLD_KEYPAD_DOWN BIT((BLEN_REPRAPWORLD_KEYPAD_DOWN+REPRAPWORLD_BTN_OFFSET))
     #define EN_REPRAPWORLD_KEYPAD_LEFT BIT((BLEN_REPRAPWORLD_KEYPAD_LEFT+REPRAPWORLD_BTN_OFFSET))
 
-    #define LCD_CLICKED ((buttons&EN_C) || (buttons&EN_REPRAPWORLD_KEYPAD_F1))
-    #define REPRAPWORLD_KEYPAD_MOVE_Y_DOWN (buttons&EN_REPRAPWORLD_KEYPAD_DOWN)
-    #define REPRAPWORLD_KEYPAD_MOVE_Y_UP (buttons&EN_REPRAPWORLD_KEYPAD_UP)
-    #define REPRAPWORLD_KEYPAD_MOVE_HOME (buttons&EN_REPRAPWORLD_KEYPAD_MIDDLE)
+    //#define LCD_CLICKED ((buttons&EN_C) || (buttons&EN_REPRAPWORLD_KEYPAD_F1))
+    //#define REPRAPWORLD_KEYPAD_MOVE_Y_DOWN (buttons&EN_REPRAPWORLD_KEYPAD_DOWN)
+    //#define REPRAPWORLD_KEYPAD_MOVE_Y_UP (buttons&EN_REPRAPWORLD_KEYPAD_UP)
+    //#define REPRAPWORLD_KEYPAD_MOVE_HOME (buttons&EN_REPRAPWORLD_KEYPAD_MIDDLE)
 
 #elif defined(NEWPANEL)
   #define LCD_CLICKED (buttons&EN_C)