Apparent date bug when creating WikiPages with CreatedDate?

It's either a bug, or a at least an oddity.

To reproduce, create a back-dated WikiPage via REST in any Wiki with the following params:

Title:A wiki page
Body:<b>Hello World</b>
CreatedDate:2015-09-15T02:29:04

The result looks like this (trimmed down for clarity):

{
  "WikiPage": {
    "ContentId": "e7dd16db-d2c9-48f1-b062-430958ea5f9f",
    "ContentTypeId": "6b577b8c-0470-4e20-9d29-b6772bf67243",
    "Title": "A wiki page",
    "PageKey": "a wiki page",
    "Url": "...",
    "Date": "2018-11-14T20:52:04.44",
    "LastModifiedDate": "2018-11-14T20:52:04.44",
    "CreatedDate": "2015-09-15T02:29:04",
    "Id": 200
  },
  "Info": [],
  "Warnings": [],
  "Errors": []
}

The important part is that it shows that the CreatedDate is correctly set to some date in 2015.

If you then fetch the same page using REST you will see that the CreatedDate has reverted to the date/time to when the content was actually created.

{
  "WikiPage": {
    "ContentId": "e7dd16db-d2c9-48f1-b062-430958ea5f9f",
    "ContentTypeId": "6b577b8c-0470-4e20-9d29-b6772bf67243",
    "Title": "A wiki page",
    "PageKey": "a wiki page",
    "Url": "...",
    "Date": "2018-11-14T20:52:04.44",
    "LastModifiedDate": "2018-11-14T20:52:04.44",
    "CreatedDate": "2018-11-14T20:52:04.487",
    "Id": 200
  },
  "Info": [],
  "Warnings": [],
  "Errors": []
}

And when viewing the versions you will see that the original version wasn't properly back-dated.

The Telligent version is 10.2.3.5050.

Some questions...

  • Is this a bug?  It seems like the purpose of the CreatedDate is to back-date the content, so it appears to be malfunctioning.
  • Is there some other way to manipulate the version date?  The purpose is that we are migrating content from an existing non-Telligent community into Telligent, and maintaining the original created date is fairly important.