gzt: It's been a while since I looked at that but don't you have the ability to delete devices yourself? I'm sure I did that..
Only 1 per month, and I had already deleted 1 instance to fix it this month so it wouldn't let me delete any more . They did reply just after I wrote here to delete them all again. They really need to fix this, as it is a poorly implented system if it does this for legitimate users. Many people will just give up on it if this happened and I suspect quite a few have. At least they should have away of purging the devices manually. Ironically if you cast to a chromecast, it doesn't have a restriction on the number of viewing devices it can connect to. So potentially you could cast to any one of 10 tvs,if you have 10 tvs and chromecasts