Disappearing Shared Tunes

I was just wondering if anybody else has had there shared tunes disappear as mine have and when I put them back up they just disappear again now it might not seem to big a deal but my tunes were just beginning to get picked up by other Forza racers and making me some extra credits so to me it is a big deal. I’m not one of the big name tuners just a guy that can make a car at least competitive and quite enjoy knowing other racers are at least using my tunes so I am more than a little disappointed that I don’t even seem able to post new tunes never mind the ones that were being enjoyed by other racers. I’m more than interested to know if this is a problem anybody else out there has had or is it just specific to me so I look forward to your responses. Cheers.