It's possible that the evaluations are correct because each country has its own requirements for the issuance of degrees and these could be less than correspond

It's possible that the evaluations are correct because each country has its own requirements for the issuance of degrees and these could be less than corresponding US requirements. For example, a number of countries will grant bachelor's degrees based on 3 years of education. They could try another evaluation service because there can be variation among services.