Do you have the hose assy twisted or on "backwards" so it's not behaving like it should? My OEM hose dropped right in, aligned perfectly, and the stop worked as it should.
The diagram from Partsouq shows it like it should be oriented.
Is this an aftermarket hose?
If so the tab may not be in the right place.
If not, pre-orient the hose too far CCW of where you want it to end up, estimating how far it will rotate before you hit torque (you've done it twice already so you should have an idea!), then install and torque and it...