From the Guide to Implementation, if you moved to Sweden, your gross monthly salary (at minimum) should be composed of a living allowance of €4880 plus a mobility allowance of €600 multiplied by a country correction coefficient, which can be found in this document, table 2 and which is 1.218 for Sweden. Thus, your gross monthly allowance calculated in this way would be €6674.
In this case, yes, you would be very much right in thinking that your salary is lower than the expected, unless I've missed something.
The Guide to Implementation, in section 3, reports the contacts in case of problems, where there is also a link to a help desk. I suggest you to read that section and follow the links and contacts there provided. In particular, there is a National Contact Point for Sweden. However, I suggest you to first formulate your question to the contact point not as an accusation, but as a request of information on the calculation of your salary.
If, instead, as suggested by Pieter Naaijkens in a comment below, you're moving to the US, the coefficient would be 0.991, yielding €5430. Even in this case, after converting to USD, your salary seems lower than expected.