Query param offset, not working for rules api

$ st2 rule list
+------------------------------+---------+-------------------------------------------+---------+
| ref                          | pack    | description                               | enabled |
+------------------------------+---------+-------------------------------------------+---------+
| chatops.notify               | chatops | Notification rule to send results of      | True    |
|                              |         | action executions to stream for chatops   |         |
| nagios.check_load            | nagios  | Check cpu load on host                    | False   |
| nagios.check_load_procd      | nagios  | Check D state procs on host when load is  | True    |
|                              |         | high                                      |         |
| nagios.check_load_procs      | nagios  | Check running procs on host when load is  | True    |
|                              |         | high                                      |         |
| nagios.check_proc            | nagios  | Check process state on host               | True    |
| nagios.notify_chat           | nagios  | Post to chat when nagios service state    | False   |
|                              |         | changes                                   |         |
| nagios.send_mail             | nagios  | Send mail when nagios service state       | False   |
|                              |         | changes                                   |         |
| twitter.relay_tweet_to_slack | twitter | Relay Tweet to the Slack channel.         | True    |
+------------------------------+---------+-------------------------------------------+---------+


$ curl -X GET -H  'Connection: keep-alive' -H  'Accept-Encoding: gzip, deflate' -H  'Accept: */*' -H  'User-Agent: python-requests/2.14.2' -H  'X-Auth-Token: 86f19c4f4b6c43b993fbf89b074d9dd7' 'http://127.0.0.1:9101/v1/rules/?limit=1&offset=0' | grep '"ref": "chatops.post_result"'
  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
                                 Dload  Upload   Total   Spent    Left  Speed
100  1017  100  1017    0     0  47267      0 --:--:-- --:--:-- --:--:-- 48428
            "ref": "chatops.post_result",


$ curl -X GET -H  'Connection: keep-alive' -H  'Accept-Encoding: gzip, deflate' -H  'Accept: */*' -H  'User-Agent: python-requests/2.14.2' -H  'X-Auth-Token: 86f19c4f4b6c43b993fbf89b074d9dd7' 'http://127.0.0.1:9101/v1/rules/?limit=1&offset=3' | grep '"ref": "chatops.post_result"'
  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
                                 Dload  Upload   Total   Spent    Left  Speed
100  1017  100  1017    0     0  41784      0 --:--:-- --:--:-- --:--:-- 42375
            "ref": "chatops.post_result",

Start by reproducing the requests against the /v1/rules/ endpoint with limit=1 and different offset values. Trace the rules API pagination handling to determine why offset=3 returns the same result as offset=0; done means successive offsets return the corresponding rule pages, with tests covering the behavior.