Yale nightlatch unlocks in both directions

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9 Feb 2022
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Hello, I recently installed a Yale PBS1 nightlatch.

Everything worked as expected, but I wanted to touch up some of the gaps in my chiselling, so I took the lock off the door to do so.

When I re-fixed the lock, the bolt now unlocks by turning the handle or key in either direction. Previously it was only in the downward / towards the door direction, which is what I would expect, so now I'm confused about what is the expected behaviour.

The deadlocking and button settings are all working correctly, and the connecting bar arrows are aligned, so I'm a bit stumped. What have I done wrong here?
 
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