Hello, 

I use the Multisite system to have two sites with same Joomla instance. 

Site A: margareta-frankfurt.de

Site B: geschichte-erinnerung.de

When I open a page in Site B (e.g. https://www.geschichte-erinnerung.de/ag-geschichte.html , this should be exclusive on Site B ) and afterwards change the domain to Sita A (https://www.margareta-frankfurt.de/ag-geschichte.html) it shows unexpected behaviour. 

Expected behaviour would be:

- Content of SIte B is exclusive to domain of SIte B

- Content of Site A is exclusive of Site A

- If a URI of Site B ist opened together with Site A, than there should be a 404 of Site A

- If a URI of Site A ist opened together with Site B, than there should be a 404 of Site B

I added Site A (also www version) in "Exclusion/Segments" of Site B site options.

I added Site B (also www version) in "Exclusion/Segments" of Site A site options.

But still pages of Site A are available under Domain Site B and vice versa. 

How can I fix this?

Thank you

Kind regards,

Daniel