Hello,
even after v.5 is official, I am still fighting with avast account. Seems it shows info about older Galaxy Tab correctly (maybe), but I have a two devices with similar setup now and I can see really big differences how account shows them.
At first I had to do several re-installs in Xperia with 5.1.1 of avast Mobile Security and Anti-Theft, because at first account decided to show two devices in the account, not one device with both products. At least now it is a single device option, but still - the information from Galaxy Tab 2 is reported in one way, from newer Xperia in another. Both devices has the same avast setup on board.
Seems something still needs to be fine tuned. You will find the differences in the screens attached. All Anti-theft premium features active and working on both devices, so the difference is only how information is shown in the account. Both devices running non BETA channel