Fix logic for showing the correct player when attempting to switch

src/pages/10_Set_Your_Lineup.py

@@ -142,9 +142,16 @@ def position_cell(
         if selected_player_from_box.gsis_id and selected_player_from_box.gsis_id != selected_id:
             if selected_player_from_box.is_locked():
                 st.warning("Sorry player's game has already started", icon="🚨")
+                display_player(selected_player)
+                return
+            elif selected_player_from_box.gsis_id in existing_selection_map.values():
+                st.warning("Player already in lineup.  Please choose another.", icon="🚨")
+                display_player(selected_player)
                 return
             else:
                 update_and_save_selection(pos_label, selected_player_from_box.gsis_id, existing_selection_map),
+        display_player(selected_player_from_box)
+    else:
         display_player(selected_player)