diff --git a/searcharray/phrase/memmap_arrays.py b/searcharray/phrase/memmap_arrays.py
index 8e21fad..e4fafd2 100644
--- a/searcharray/phrase/memmap_arrays.py
+++ b/searcharray/phrase/memmap_arrays.py
@@ -73,10 +73,14 @@ def concat(lhs: 'ArrayDict', rhs: 'ArrayDict', sort=True):
             if key not in fetched_keys:
                 curr_offset += value.size
                 lst_of_arrays.append(value)
-                metadata[key] = {'offset': last_offset, 'length': curr_offset}
+                metadata[key] = {'offset': last_offset, 'length': curr_offset - last_offset}
                 last_offset = curr_offset
 
         arr.metadata = metadata
+        for curr_arr in lst_of_arrays:
+            if sort:
+                curr_arr.sort()
+
         arr.data = np.concatenate(lst_of_arrays)
         return arr
 
diff --git a/test/test_tmdb.py b/test/test_tmdb.py
index dd9f62e..5b84e70 100644
--- a/test/test_tmdb.py
+++ b/test/test_tmdb.py
@@ -37,13 +37,6 @@ def ensure_data_dir_exists():
         pass
 
 
-@pytest.fixture(scope="session", autouse=True)
-def clean_up():
-    ensure_data_dir_exists()
-    yield
-    clean_data_dir()
-
-
 @pytest.fixture(scope="session")
 def tmdb_raw_data():
     path = 'fixtures/tmdb.json.gz'
@@ -72,9 +65,11 @@ def tmdb_pd_data(tmdb_raw_data):
     return df
 
 
-@pytest.fixture(scope="module", params=["full", "ends_empty", "memmap", "small_batch",
-                                        "smallbatch_memmap"])
+@pytest.fixture(scope="session", params=["full", "ends_empty", "memmap", "small_batch",
+                                         "smallbatch_memmap"])
 def tmdb_data(tmdb_pd_data, request):
+    ensure_data_dir_exists()
+    print(f"Rebuilding index with {request.param}")
     df = tmdb_pd_data
     indexed = SearchArray.index(df['title'],
                                 batch_size=5000 if request.param in ["small_batch", "smallbatch_memmap"] else 100000,
@@ -90,7 +85,8 @@ def tmdb_data(tmdb_pd_data, request):
                                 batch_size=5000 if request.param in ["small_batch", "smallbatch_memmap"] else 100000,
                                 data_dir=DATA_DIR if request.param == "memmap" else None)
     df['overview_tokens'] = indexed
-    return df
+    yield df
+    clean_data_dir()
 
 
 def test_tokenize_tmdb(tmdb_raw_data):
@@ -187,9 +183,25 @@ def test_tmdb_expected_edismax(query, tmdb_data):
     title_has_term = np.sum([naive_find_term(tmdb_data['title'],
                              query_term,
                              title_tokenizer) for query_term in title_tokenizer(query)], axis=0) > 0
+    tmdb_data['title_has_term'] = title_has_term
     overview_has_term = np.sum([naive_find_term(tmdb_data['overview'],
                                 query_term,
                                 overview_tokenizer) for query_term in overview_tokenizer(query)], axis=0) > 0
+    tmdb_data['overview_has_term'] = overview_has_term
+    tmdb_data['sum_has_term'] = title_has_term + overview_has_term
+
+    title_has_term2 = np.sum([naive_find_term(tmdb_data['title'],
+                             query_term,
+                             title_tokenizer) for query_term in title_tokenizer(query)], axis=0) > 0
+    tmdb_data['title_has_term2'] = title_has_term2
+    overview_has_term2 = np.sum([naive_find_term(tmdb_data['overview'],
+                                query_term,
+                                overview_tokenizer) for query_term in overview_tokenizer(query)], axis=0) > 0
+    tmdb_data['overview_has_term'] = overview_has_term2
+    tmdb_data['sum_has_term2'] = title_has_term + overview_has_term
+    assert np.all(title_has_term == title_has_term2)
+    assert np.all(overview_has_term == overview_has_term2)
+    assert np.all(tmdb_data['sum_has_term'] == tmdb_data['sum_has_term2'])
 
     matches, _ = edismax(tmdb_data, q=query,
                          qf=["title_tokens^2", "overview_tokens"],
@@ -197,9 +209,10 @@ def test_tmdb_expected_edismax(query, tmdb_data):
                          pf2=["title_tokens^2", "overview_tokens"],
                          tie=0.1,
                          mm=1)
-    matches = tmdb_data[matches > 0]
+    tmdb_data['matches'] = matches
     expected_matches = tmdb_data[title_has_term | overview_has_term].index
     print(f"Query - {query} | Expected: {len(expected_matches)}")
+    matches = tmdb_data[matches > 0]
     assert np.all(matches.index == expected_matches)