Alignment shop says they can't get over 1 degree positive caster on 73 Scamp

Is it common for stock parts on a 73 Scamp or do they just not know how to adjust it correctly? Also, they set the toe at .14. I had asked for .06, the tires do make a squeal noise on asphalt and my tires are hot after driving. Other than that is drives good.

Firestone has already attempted 3 alignments, luckily I got the lifetime one. The specs I requested were +4.5 caster, -.5 camber and .06 toe. They gave me +1/+.8 caster, +.6 camber and the .14 toe.