Blavatar help needed

I changed my blavatar a few days ago and slowly it is changing in various places, but the old blavatar is on my tabbed browser and on my bookmark link. What am I doing wrong? I followed the instructions in the post from the fall re blavatars. @sashay909

Also, does anyone have any ideas on how I can keep the option of show/hid comment thread set to HIDE? I have to change this every time I come on the site. otherwise it makes scrolling through looking for a particular post impossible.
#feedback, #help

Thanks y’all