More Problems After Suspension Rebuild
It may be those two piece bushings are too thick for the application (regardless of what the seller lists. :( )
I can't say this is or is not the direct cause, but possibly a contributor. Also..
Multi-piece bushing assembly have a metal sleeve and the ones for fine threaded strut rods have retaining washers like shown in the shop manual.
When torqued to spec, the retainers contact the metal sleeve.
40 ft-lbs for all car lines.
And yes there should be a roll pin or cotter pin as an extra safety measure.