diff --git a/influxdb.py b/influxdb.py
index 6a22f8e..2a16e52 100644
--- a/influxdb.py
+++ b/influxdb.py
@@ -483,20 +483,38 @@ class InfluxDataGetter:
             |> range(start: {time[0]}, stop: {time[1] + 1})
             |> filter(fn : (r) => r._measurement == "{variable}")
             |> filter(fn : (r) => r._field == "{parameter+"_float"}")
-            {"|> aggregateWindow(every: duration(v:"+str(interval)+"), fn: last, createEmpty:false)" if interval else ""}
-            |> keep(columns: ["_time","_value","expired"])
+            {"|> aggregateWindow(every: duration(v:"+str(interval)+"), fn: last, createEmpty:false, timeDst:"+chr(34)+"binning_time"+chr(34)+")" if interval else ""}
+            |> keep(columns: ["_time","_value","expired"{", "+chr(34)+"binning_time"+chr(34) if interval else ""}])
             |> yield(name: "res")
             """
         tables = self._db.query(query)
         for table in tables:
             for record in table.records:
-                t = round(datetime.timestamp(record.get_time()), 3)
+                t = round(datetime.timestamp(record["binning_time"] if interval else record.get_time()), 3) # t is the real timestamp if no interval is given, or the binned timestamp if interval
                 value = record.get_value()
                 try:
                     value = PrettyFloat(value)
                 except:
                     value = None
-                raw.append([t, value, record["expired"]])
+                point = [t, value, record["expired"]]
+                if interval: # t is the binning time, we need to add the real time of the point that was used in this interval
+                    point.append(record.get_time())
+                raw.append(point)
+
+        if interval:
+            indexes_to_delete = []
+            expired_points = {i:point for i,point in enumerate(raw) if point[2] == "True"} #we need to keep track of the indexes of the expired point in the list
+            for expired_point_index, expired_point in expired_points.items():
+                for i, point in enumerate(raw):
+                    if point[2] == "False" and expired_point[0] == point[0]: # if the current point is expired and has the same binning time as the current expired point
+                        if point[3] > expired_point[3]: # comparison on the real timestamp used.
+                            indexes_to_delete.insert(0, expired_point_index)
+                        else:
+                            indexes_to_delete.insert(0,i)
+            sorted(indexes_to_delete, reverse=True) #we have to make sure that the list is sorted in reverse to then delete at the given indexes
+            for index in indexes_to_delete:
+                del raw[index]
+
         sorted_raw = sorted(raw, key=lambda pair: pair[0]) #expired=True and expired=False are in two Influx tables, so they need to be synchronized
         res = []
         for pair in sorted_raw: