I had my car aligned after A-arm bushings and ball joint and the tech couldn’t hit the caster spec. The caster spec he shows are 9.8 to 10.2 Deg. He could only hit 4.4. What could cause this? Are the settings correct? I have 16” wheels and AMG changed the springs but I can’t imagine it affecting the caster. Any help?

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Steve
1985 Mercedes 500SL Euro (Gray market)
1995 BMW 520i Euro (Gray market)
1992 BMW 525it Wagon
1994 Honda Del Sol Si