So, my macbook is listed twice - after the debacle last month when devices became de-registered for no reason. Today it tells me that the macbook I am using (listed there twice) is not a recognised device but I have one change left for this month. So, I try and delete one iteration of my laptop but get a spinning wheel as it thinks about deleting it - 5 minutes later it is still thinking! So, the device I am using is not detected even though it is twice listed, attempts to delete one and add this same one again - not working. Let us hope this isn't a repeat of last month!
Well, after my original post, it suddenly decided that it could recognise my laptop (which is actually the same device named twice!) so I didn't do anything more about it.
I noticed your reply and thought - it's OK, it obviously solved itself - ha! spoke too soon, today I had to log in again, bingo - device not detected even though this device is listed there TWICE!
So, as per your instructions - using Safari, I have deleted all cache and cookie data for the site - nothing, nada, zip, no device recognised and no device changes until tomorrow. If I use one tomorrow then it drops the ball again, I am likely left for the month with no devices even though this device is sitting there patiently on the list.
Why is it that devices drop out and fail to be recognised after a time?