The Avast notification area icon has always been locked on the right, to the left of time/date. Since the last update (19.1.2360) it goes on the far left when another application icon is added (like Steam).
This is not normal and is annoying not just for a habit matter but because I would consider Avast-Time-Notification as a “default block” while I would consider what’s on the left as “current” applications.
This is what should happen:
http://i64.tinypic.com/2v91x14.jpg
This is what happens instead:
http://i66.tinypic.com/hv6xzr.jpg
I have Windows 10 Pro, 64 bit, version 1809.