Fix data_ts when clock is updated

src/insert.py

@@ -246,7 +246,7 @@ def main(argv = None):
                                    timestamp_to_human(data_ts),
                                    timestamp_to_human(clock_ts))
                         stream.finalize()
-                        data_ts_base = clock_ts
+                        data_ts_base = data_ts = clock_ts
                         data_ts_inc = 0
 
                     # Don't use this clock time anymore until we update it