why non-exit node becomes last in the circuits?

Hello. On Tails: Today i found that my jabber messenger (with server in *.onion) use onion circuit with three nodes, and two times from two exit-nodes were very strange. https://metrics.torproject.org/rs.html#details/92E807AC5E23CCD9FE623EA4DC020... https://metrics.torproject.org/rs.html#details/AC5CECEF6AF649F2A7F047D102FE9... They havnt exit-flag. Why it happen?

On Mon, 10 Aug 2020 at 14:56, tor-operator-sahara-it <tor-operator-sahara-it@protonmail.com> wrote:
Hello.
On Tails: Today i found that my jabber messenger (with server in *.onion) use onion circuit with three nodes, and two times from two exit-nodes were very strange.
I believe the point of using a .onion service is that you don't need to go through an exit relay (which is a relay connecting you to non tor services through the "normal" internet) as your service is already directly connected to the tor network, so you can directly build a circuit to it instead of building a circuit to an exit and then connection to your destination. My mental model for a .onion service is a dedicated exit allowing only that service, I have no idea how far from reality this is :)
https://metrics.torproject.org/rs.html#details/92E807AC5E23CCD9FE623EA4DC020...
https://metrics.torproject.org/rs.html#details/AC5CECEF6AF649F2A7F047D102FE9...
They havnt exit-flag. Why it happen?
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On Mon, Aug 10, 2020 at 9:55 AM tor-operator-sahara-it <tor-operator-sahara-it@protonmail.com> wrote:
Hello.
On Tails: Today i found that my jabber messenger (with server in *.onion) use onion circuit with three nodes, and two times from two exit-nodes were very strange.
https://metrics.torproject.org/rs.html#details/92E807AC5E23CCD9FE623EA4DC020...
https://metrics.torproject.org/rs.html#details/AC5CECEF6AF649F2A7F047D102FE9...
They havnt exit-flag. Why it happen?
Onion services don't need to use exit nodes, since their traffic doesn't need to leave the tor network. -- Nick

yes yes understand. thank you Sent with ProtonMail Secure Email. ‐‐‐‐‐‐‐ Original Message ‐‐‐‐‐‐‐ On Monday, August 10, 2020 2:12 PM, Nick Mathewson <nickm@torproject.org> wrote:
On Mon, Aug 10, 2020 at 9:55 AM tor-operator-sahara-it tor-operator-sahara-it@protonmail.com wrote:
Hello. On Tails: Today i found that my jabber messenger (with server in *.onion) use onion circuit with three nodes, and two times from two exit-nodes were very strange. https://metrics.torproject.org/rs.html#details/92E807AC5E23CCD9FE623EA4DC020... https://metrics.torproject.org/rs.html#details/AC5CECEF6AF649F2A7F047D102FE9... They havnt exit-flag. Why it happen?
Onion services don't need to use exit nodes, since their traffic doesn't need to leave the tor network.
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Nick
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tor-operator-sahara-it