diff --git a/benchmarks/benchmark/tasks/v1_0/recommendation/utils.py b/benchmarks/benchmark/tasks/v1_0/recommendation/utils.py
index eb12122..42cf2a3 100644
--- a/benchmarks/benchmark/tasks/v1_0/recommendation/utils.py
+++ b/benchmarks/benchmark/tasks/v1_0/recommendation/utils.py
@@ -7,26 +7,22 @@
 from typing import Set, Dict, List, Any
 
 
-def extract_ids_from_answer(answer: str) -> Set[str]:
-    """
-    Extract all SIDs from answer field
-    
-    Args:
-        answer: String containing multiple <|sid_begin|>...<|sid_end|> patterns
-    
-    Returns:
-        Set of extracted SIDs
-    
-    Examples:
-        >>> extract_ids_from_answer("<|sid_begin|>123<|sid_end|><|sid_begin|>456<|sid_end|>")
-        {'123', '456'}
+def extract_ids_from_answer(answer: str) -> list[str]:
+    """Extract all SIDs from answer field, preserving original order.
+
+    Returns a deduplicated list that keeps the first occurrence order.
+
+    >>> extract_ids_from_answer("<|sid_begin|>123<|sid_end|><|sid_begin|>456<|sid_end|>")
+    ['123', '456']
     """
-    correct_answers = set()
+    seen: set[str] = set()
+    correct_answers: list[str] = []
     for part in answer.split('<|sid_begin|>'):
         if '<|sid_end|>' in part:
             sid = part.split('<|sid_end|>')[0].strip()
-            if sid:
-                correct_answers.add(sid)
+            if sid and sid not in seen:
+                correct_answers.append(sid)
+                seen.add(sid)
     return correct_answers
 
 
diff --git a/benchmarks/benchmark/tasks/v1_0/recommendation/utils_by_pid.py b/benchmarks/benchmark/tasks/v1_0/recommendation/utils_by_pid.py
index f3c56f1..bc06671 100644
--- a/benchmarks/benchmark/tasks/v1_0/recommendation/utils_by_pid.py
+++ b/benchmarks/benchmark/tasks/v1_0/recommendation/utils_by_pid.py
@@ -129,15 +129,21 @@ def apply_sid_to_pid_strategy(pid_info_list: List[Dict[str, int]], strategy: str
         raise ValueError(f"Unknown strategy: {strategy}. Must be 'most_popular_originally', 'most_popular_after_downsampling', or 'random'")
 
 
-def extract_ids_from_answer(answer: List[int]) -> Set[int]:
-    """
-    Extract all PIDs from answer field (metadata["answer_pid"]) or (metadata["answer_iid"])
+def extract_ids_from_answer(answer: list[int]) -> list[int]:
+    """Extract all PIDs from answer field, preserving original order.
 
-    Examples:
-        >>> extract_ids_from_answer([123, 456, 789])
-        {123, 456, 789}
+    Returns a deduplicated list that keeps the first occurrence order.
+
+    >>> extract_ids_from_answer([123, 456, 123, 789])
+    [123, 456, 789]
     """
-    return set([pid for pid in answer if pid != 0])
+    seen: set[int] = set()
+    correct_answers: list[int] = []
+    for pid in answer:
+        if pid != 0 and pid not in seen:
+            correct_answers.append(pid)
+            seen.add(pid)
+    return correct_answers
 
 
 def extract_first_id_from_answer(answer: List[int]) -> int: