I'm not sure this is possible but can the bold be removed from the pinned topics? Most sites have unread posts in bold. I see all these bold topics and think I haven't read them. My attention is pointing to things that are old.
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This is the way your post appears just now ... all yellow background Capture.JPG
... or is that not what you are talking about?
The yellow highlighting seems to be visible on any post you directly click on.
I guess the issue is actually that the forum thinks you've not read them, thus, marks them bold?
Unfortunately, it appears to be a "feature" of the SMF forum software update. Even when marking post read and also reading a pinned post, the subject remains in bold.
A couple of other things:
1. To avoid the "bold" topics, consider expanding the "LandzDown Forum - Info Center" at the bottom of the forum home page. From there, you'll see a list of the latest posts.
2. The software update resulted in the time zone defaulting to Greenwich. To change it to your time zone, click on your username at the forum and select "Look and Layout" to select the correct time zone from the drop-down menu.