diff --git a/models/multitask/ple/net.py b/models/multitask/ple/net.py
index e36d624a9..2490b7695 100644
--- a/models/multitask/ple/net.py
+++ b/models/multitask/ple/net.py
@@ -179,7 +179,7 @@ def forward(self, input_data):
         # task-specific expert part
         for i in range(0, self.task_num):
             for j in range(0, self.exp_per_task):
-                linear_out = self._param_expert[i * self.task_num + j](
+                linear_out = self._param_expert[i * self.exp_per_task + j](
                     input_data[i])
                 expert_output = F.relu(linear_out)
                 expert_outputs.append(expert_output)
diff --git a/tools/utils/static_ps/reader_helper.py b/tools/utils/static_ps/reader_helper.py
index 73b0c0540..310b08463 100755
--- a/tools/utils/static_ps/reader_helper.py
+++ b/tools/utils/static_ps/reader_helper.py
@@ -73,7 +73,7 @@ def get_infer_reader(input_var, config):
 
 def get_file_list(data_path, config):
     assert os.path.exists(data_path)
-    file_list = [data_path + "/%s" % x for x in os.listdir(data_path)]
+    file_list = [data_path + "/%s" % x for x in sorted(os.listdir(data_path))]
     if config.get("runner.split_file_list"):
         logger.info("Split file list for worker {}".format(fleet.worker_index(
         )))