Refactor payout calculation for tied positions in app.py

- Updated the get_payout_for_position function to correctly handle 1-indexed positions when calculating payouts for ties, ensuring accurate payout distribution.
- Adjusted the range in the payout calculation loop to reflect the new indexing, improving the clarity and correctness of the payout logic.

app.py

@@ -127,11 +127,15 @@ def get_payout_for_position(finish_pos, payout_df, dupes_count):
             return 0
     else:
         # Handle tie - sum payouts for the range of positions and divide by number of ties
+        # Convert to 1-indexed positions for payout lookup
+        start_pos = finish_pos + 1  # 1-indexed start position
+        end_pos = finish_pos + dupes_count  # 1-indexed end position
+        
         total_payout = 0
-        for pos in range(finish_pos, finish_pos + dupes_count):
+        for pos in range(start_pos, end_pos + 1):
             matching_row = payout_df[
-                (payout_df['minPosition'] <= pos + 1) & 
-                (payout_df['maxPosition'] >= pos + 1)
+                (payout_df['minPosition'] <= pos) & 
+                (payout_df['maxPosition'] >= pos)
             ]
             if not matching_row.empty:
                 total_payout += matching_row.iloc[0]['value']