iter_glucose_pages not returning reverse-chronological cursor as expected by openaps

[loudnate]

$ openaps use pump iter_glucose 5
[
  {
    "body": "", 
    "packet_size": 4, 
    "name": "SensorSync", 
    "raw": "49-c0-22-0f", 
    "date": "2015-07-02T09:00:00", 
    "date_type": "minSpecific", 
    "_tell": 714, 
    "op": "0x0d"
  }, 
  {
    "body": "31", 
    "packet_size": 5, 
    "amount": 49, 
    "name": "CalBGForGH", 
    "raw": "49-c1-02-8f-31", 
    "date": "2015-07-02T09:01:00", 
    "date_type": "minSpecific", 
    "_tell": 706, 
    "op": "0x0e"
  }, 
  {
    "packet_size": 6, 
    "name": "SensorCalFactor", 
    "raw": "49-d0-02-0f-15-97", 
    "date": "2015-07-02T09:16:00", 
    "factor": 5.527, 
    "date_type": "minSpecific", 
    "_tell": 694, 
    "op": "0x0f"
  }, 
  {
    "name": "GlucoseSensorData", 
    "date_type": "prevTimestamp", 
    "_tell": 693, 
    "sgv": 46, 
    "date": "2015-07-02T09:21:00", 
    "packet_size": 0, 
    "op": 23
  }, 
  {
    "name": "GlucoseSensorData", 
    "date_type": "prevTimestamp", 
    "_tell": 692, 
    "sgv": 46, 
    "date": "2015-07-02T09:26:00", 
    "packet_size": 0, 
    "op": 23
  }, 
  {
    "name": "GlucoseSensorData", 
    "date_type": "prevTimestamp", 
    "_tell": 691, 
    "sgv": 46, 
    "date": "2015-07-02T09:31:00", 
    "packet_size": 0, 
    "op": 23
  }
]