Entries from multiple blogs displayed in one - paths problem

Hi all!

In total, I’ve got 4 separate blogs, including one main blog which shows its own entries and all other blogs’ entries as well: http://www.rueckspiegel.org/

For three of those four blogs (all of which work fine on their own b.t.w.), the comment links point to the correct original blog. For the fourth blog… they don’t. Instead, they point to the “main” blog as though the entry had been written there directly.

This is the code I’m using to display the entries in my main blog:

Works fine for the blogs “aquaria”, “kinderzimmer” and “site_index” a.k.a. “zickenterror”. Doesn’t work for “feinstoff”, though - no matter in which order I list the blogs. I’ve checked the numbers, I’ve double-checked the names. To no avail. Each and every entry assigned to “feinstoff” and displayed in the main blog has a comment link that points to the latter instead of the former.

Does anyone have an idea why this happens?

Thank you and kind regards,

Ute