How to get actual Version(revision) number of file containing multiple versions?

I have used "/revisions" to get the all version of file.But I am not getting actual versions of file by sequentially (getting it randomly like 1,4,11,15)

Please see the below response of file containing 2 version.

For this I expecting  1,2

[
    {
        "revision": 4,
        "rev": "40000000d",
        "thumb_exists": false,
        "bytes": 0,
        "modified": "Wed, 20 Jul 2011 22:41:09 +0000",
        "path": "/hi2",
        "is_dir": false,
        "icon": "page_white",
        "root": "app_folder",
        "mime_type": "application/octet-stream",
        "size": "0 bytes"
    },
    {
        "revision": 1,
        "rev": "10000000d",
        "thumb_exists": false,
        "bytes": 3,
        "modified": "Wed, 20 Jul 2011 22:40:43 +0000",
        "path": "/hi2",
        "is_dir": false,
        "icon": "page_white",
        "root": "app_folder",
        "mime_type": "application/octet-stream",
        "size": "3 bytes"
    }
]

Here is my sample code:

 OAuthUtility.GetAsync
 (
 "https://api.dropboxapi.com/1/revisions/auto/",
 new HttpParameterCollection
 {
 { "path", this.CurrentPath },
 { "access_token",accessToken },
 { "rev_limit", 1000 }
 },
 callback: GetFilesRevisions_Results
 );

Can you please help me ?
Thanks in advance!