auto-schedule-pro-v2: fix negative day shifts being interpreted as positive ones

modules/auto-schedule-pro-v2/main.py

@@ -92,14 +92,17 @@ def process_arguments(args, base_day):
     preferences = {}
 
     for arg in args:
-        if arg[1:].isdigit():
-            selected_day += int(arg[1:])
-            continue
-
         if arg[0] == "-":
-            preferences[arg[1:]] = False
+            if arg[1:].isdigit():
+                selected_day -= int(arg[1:])
+            else:
+                preferences[arg[1:]] = False
+        
         elif arg[0] == "+":
-            preferences[arg[1:]] = True
+            if arg[1:].isdigit():
+                selected_day += int(arg[1:])
+            else:
+                preferences[arg[1:]] = True
 
     selected_day = selected_day % 14