Hi Tobias,
Yes. I think I should write a post on this. This is the key reason why many people today are confused about “anatta” as “no-self”.
Even in English (and in other languages), there are some words that have double meanings. For example, the word “right” is used to mean two different things in the sentences: “You are right” and “Turn right”.
Here is another example with the word “leaves”: “He leaves for work early morning”, AND “This tree has green leaves”.
So, “anatta” in that latter sentence “sabbe dhamma anatta“, has NOTHING to do with “atta” and “na atta” with reference to a “self” and “no-self”.
If you read the English translation at the Sutta Central site (with this key information in mind), you may be able to see what I mean. There, Vaccagotta also got confused, and the Buddha explained this to Ven. Ananda after Vaccagotta left.
I will write a post with more references from the Tipitaka, since this is a key issue.