Sometimes, feeds display articles that are not actually
from the feed.
I've seen this for some time now and I do not know what
to do to reproduce the problem as it just seems to
happen on its own.
As an example, my Dilbert cartoon feed today was
displaying articles from TechReview as "Dilber" feeds.
Also, another feed (Qatfish), which has very few
updates, suddenly showed 40+ new articles, all of which
were actually feeds from Anandtech or DailyTech.
In the case of the Qatfish, last time this happened, I
deleted the feed and re-entered it and things worked
fine for a while. However, today, it got messed-up again.
The attached screenshot shows the Dilbert situation.