I noticed what is happening lately with the links... if there is a space in the webpage address that you copy over, the site is not including that in the link and is putting it into your post as regular text
there is a space between the first front slash and the 'a' in acatalog, so what is happening you will notice that the link is not all in pink and underlined. It could just be a system glitch.
I would recomend that if you see a link (it is pink in color with an underline under it) that is partially pink and then as some regular writing after that that looks like it should be part of the link, I would copy and paste the whole link in a new window, delete out the extra space in the address line, and then hit enter on your keyboard in order to look at it.
Or is a person is typing their post up and they see the issue with the link not working right, they should go back and edit their post so that they link works right.
this would be the corrected link