Dailymotion API return very old cached version - caching

Question

My application load regulary the number of viewers watching a livestream on dailymotion.
I use the dailymotion API with the field "audience" to do that.
But the server is sending to me a really really old cached version of the precious JSON file.
For example, a streamer is live since 2 hours, but the API is sending this to me :
curl https://api.dailymotion.com/video/x25eyo8?fields=audience
{"audience":0}
If i add another field just a few seconds later, just to see :
curl https://api.dailymotion.com/video/x25eyo8?fields=audience,onair
{"audience":1177, onair: true}
And if I re-send the first request
curl https://api.dailymotion.com/video/x25eyo8?fields=audience
{"audience":0}
More interesting, the headers sent by the server show this :
curl -I https://api.dailymotion.com/video/x25eyo8?fields=audience
HTTP/1.1 200 OK
Server: DMS/1.0.42
X-Dm-Api-Object: video
X-DM-BackNode: web-011.adm.dailymotion.com:80
Cache-Control: public, max-age=10, stale-if-error=900
X-Dm-Api-Method: info
Content-Type: application/json; charset=UTF-8
X-DM-LB: 195.8.215.130
Access-Control-Allow-Origin: *
X-DM-BackNode-Response-Time: 47
Etag: W/"8xO_txIM6arAYYIALcRUgg"
X-Robots-Tag: noindex
Last-Modified: Fri, 06 Nov 2015 20:20:31 GMT
Access-Control-Allow-Headers: Content-Type, Authorization
Access-Control-Allow-Methods: GET, POST, DELETE
X-Dm-Page: fr.rest.rest_api
Via: 1.1 varnish
Fastly-Debug-Digest: 1d9daef237214a02cb79d06c44fdaa26329d5bd16c9afda535f3f9b104438b84
Content-Length: 17
Accept-Ranges: bytes
Date: Mon, 30 Nov 2015 01:16:59 GMT
Via: 1.1 varnish
Age: 116
Connection: keep-alive
X-Served-By: cache-fra1225-FRA, cache-lhr6323-LHR
X-Cache: HIT, MISS
X-Cache-Hits: 1, 0
Vary: X-DM-EC-Geo-Country, Accept-Encoding
Age : 116 with a max-age of 10 ?
And even when i receive an "up to date" version (age < 10), the file still contains 0 viewers whereas the stream is online and 1000+ viewers are watching.
Now there are 2 questions :
Why this happens ?
Can I force a non-cached version ?
Thanks for your help.
EDIT :
It looks like it's the same problem when you watch a stream on http://games.dailymotion.com/. For all channels, numbers of viewers are correct inside the player but for some ones, the number displayed under it is not (most of the time, it indicate 0)
Example of wrong number of viewers