Help! But it works fine in Opera

This is the moment when the nice hunky handyman is supposed to step in. My blogg is messy in IE6, stuck on Wed. 20 in Firefox 104 and surprisingly to me works just fine in Opera 8 as far as I can see. Help! No one ever told me I needed an emergency tool kit when I signed up with Blogger! (I'm still in love with this publishing tool, though). Now, Superman, where are you?

PS: Bloggers spelling tool is right now asking me if I want to replace the unknown word 'blogg' (sic!) with bloch, blows, bloke, blocs, bolos, blouse etc. etc.