diff --git a/src/services/transaction_import_service.py b/src/services/transaction_import_service.py
index 1b6a7f2..f6f59c2 100644
--- a/src/services/transaction_import_service.py
+++ b/src/services/transaction_import_service.py
@@ -47,8 +47,11 @@ def import_file(self, file: str) -> bool:
         stored_transactions = self.api.accounts.get_account_transactions(
             account_id=account.id, start_date=start_date, end_date=end_date)
 
-        stored_transactions_by_reference = {t.internal_reference: t for t in stored_transactions
-                                            if t.internal_reference is not None}
+        stored_transactions_by_reference = {
+            hash_part.strip(): t
+            for t in stored_transactions
+            for hash_part in (t.internal_reference.split(',') if t.internal_reference is not None else [])
+            if hash_part}
 
         tag = self.__create_tag_for_import(file, account, start_date, end_date) if not self.dry_run else None
 
diff --git a/src/services/transaction_link_service.py b/src/services/transaction_link_service.py
index ff17eba..9fce4bc 100644
--- a/src/services/transaction_link_service.py
+++ b/src/services/transaction_link_service.py
@@ -10,6 +10,10 @@
 from ..firefly_api.api import FireflyApi
 
 
+DEFAULT_AMOUNT_DIFF_PERCENTAGE = 2.0
+DEFAULT_DATE_DIFF_DAYS = 3
+
+
 class TransactionLinkService(BaseService):
 
     def __init__(self, api: FireflyApi, dry_run: bool) -> None:
@@ -61,7 +65,10 @@ def link_identical_transactions(
 
     def __get_identical_transactions_by_source(
             self, start_date: datetime = None, end_date: datetime = None,
-            amount_diff_percentage: float = 2.0, date_diff_days: int = 3) -> Dict[Transaction, List[Transaction]]:
+            amount_diff_percentage: float = DEFAULT_AMOUNT_DIFF_PERCENTAGE,
+            date_diff_days: int = DEFAULT_DATE_DIFF_DAYS) -> Dict[Transaction, List[Transaction]]:
+        amount_diff_percentage = DEFAULT_AMOUNT_DIFF_PERCENTAGE if amount_diff_percentage is None else amount_diff_percentage
+        date_diff_days = DEFAULT_DATE_DIFF_DAYS if date_diff_days is None else date_diff_days
         transactions = self.api.transactions.get_transactions(transaction_type=TransactionType.ALL,
                                                               start_date=start_date,
                                                               end_date=end_date)
diff --git a/src/utils/file_watcher_handler.py b/src/utils/file_watcher_handler.py
index 96086b5..a497ef4 100644
--- a/src/utils/file_watcher_handler.py
+++ b/src/utils/file_watcher_handler.py
@@ -1,7 +1,6 @@
 import logging
 import os
 import shutil
-import traceback
 from watchdog.events import FileSystemEventHandler
 
 from ..firefly_sync_cli import FireflySyncCli
@@ -23,7 +22,7 @@ def safe_import_and_move_file(self, file_path):
         try:
             self.import_and_move_file(file_path=file_path)
         except Exception as e:  # noqa: F841
-            logging.error(traceback.format_exc())
+            logging.error(e)
 
     def import_and_move_file(self, file_path):
         if not os.path.exists(file_path):