page shows in search results... link broken

I searched triads

I noticed there's blog post about the concept

often posts like that serve as a nice summary of the concept; with an organization of relevant courses from the GT catalog

I'm assuming the post still exists because it's showing up in search

however the link is broken

Thank you, Robert! I'll submit this to the tech crew.

-Carl. 

FYI: there's a LOT of instances of this.
I just haven't been posting about most of them.

Hi Robert,

Is it just blog links or are there other pages as well?

other pages as well.

eg.
Schlegal has a post pinned of his classical lessons...
and those links worked for a while...

but then every one I clicked on gave a [this page doesn't exist]

I brought that to Schlegal's attention; and if I recall he told me [GT changed something in their database at some point]; or something to that effect.

in general...

periodically I'll come across a link in a blog post; that results in said error
but I have no idea if those are links to another blog post; or lesson set; because the link is broken.