diff --git a/dspy/teleprompt/bootstrap_trace.py b/dspy/teleprompt/bootstrap_trace.py
index 2f0cc60cd1..8645d56998 100644
--- a/dspy/teleprompt/bootstrap_trace.py
+++ b/dspy/teleprompt/bootstrap_trace.py
@@ -51,10 +51,10 @@ def bootstrap_trace_data(
     )
 
     def wrapped_metric(example, prediction, trace=None):
-        prediction, _ = prediction
+        prediction, captured_trace = prediction
         if isinstance(prediction, FailedPrediction):
             return prediction.format_reward or format_failure_score
-        return metric(example, prediction, trace) if metric else True
+        return metric(example, prediction, captured_trace) if metric else True
 
     # Use `object.__getattribute__` to bypass the custom hook `Module.__getattribute__` so that we avoid
     # the warning that `forward` is not accessed through `__call__`.
@@ -87,7 +87,7 @@ def patched_forward(program_to_use: Module, **kwargs):
                     failed_pred = FailedPrediction(
                         completion_text=completion_str,
                         format_reward=format_failure_score
-                        + (failure_score - format_failure_score) * (present / expected),
+                        + (failure_score - format_failure_score) * (len(present) / len(expected)),
                     )
                 else:
                     failed_pred = FailedPrediction(completion_text=completion_str, format_reward=format_failure_score)