Applying the patch of mar771 right.

config.def.h

@@ -138,8 +138,8 @@ static Key key[] = {
 	{ XK_KP_Delete,     ControlMask,    "\033[3;5~",    +1,    0,    0},
 	{ XK_KP_Delete,     ShiftMask,      "\033[2K",      +1,    0,    0},
 	{ XK_KP_Delete,     ShiftMask,      "\033[3;2~",    -1,    0,    0},
-	{ XK_KP_Delete,     XK_ANY_MOD,     "\033[3~",      +1,    0,    0},
-	{ XK_KP_Delete,     XK_ANY_MOD,     "\033[P",       -1,    0,    0},
+	{ XK_KP_Delete,     XK_ANY_MOD,     "\033[3~",      -1,    0,    0},
+	{ XK_KP_Delete,     XK_ANY_MOD,     "\033[P",       +1,    0,    0},
 	{ XK_KP_Multiply,   XK_ANY_MOD,     "\033Oj",       +2,    0,    0},
 	{ XK_KP_Add,        XK_ANY_MOD,     "\033Ok",       +2,    0,    0},
 	{ XK_KP_Enter,      XK_ANY_MOD,     "\033OM",       +2,    0,    0},
@@ -194,8 +194,8 @@ static Key key[] = {
 	{ XK_Delete,        ControlMask,    "\033[3;5~",    +1,    0,    0},
 	{ XK_Delete,        ShiftMask,      "\033[2K",      +1,    0,    0},
 	{ XK_Delete,        ShiftMask,      "\033[3;2~",    -1,    0,    0},
-	{ XK_Delete,        XK_ANY_MOD,     "\033[3~",      +1,    0,    0},
-	{ XK_Delete,        XK_ANY_MOD,     "\033[P",       -1,    0,    0},
+	{ XK_Delete,        XK_ANY_MOD,     "\033[3~",      -1,    0,    0},
+	{ XK_Delete,        XK_ANY_MOD,     "\033[P",       +1,    0,    0},
 	{ XK_Home,          ShiftMask,      "\033[1;2H",     0,    0,    0},
 	{ XK_Home,          XK_ANY_MOD,     "\033[H",        0,   -1,    0},
 	{ XK_Home,          XK_ANY_MOD,     "\033[1~",       0,   +1,    0},