OK, at least you know that the connection to your avast account was made, one down, hopefully the others will come up in due course.
EDIT: Interesting, you can't get them to show up and now I'm showing extra installations (3 when I only have 2) and the win7 ones are showing 20 hours since last communication. The my.account.com is certainly displaying (excuse the pun) some weird results or lack of them.