Loan services base a lot of their decisions off of the credit scores and the details that the credit report will have on it. But, that does not mean that all of them are the same. If you are rejected by one company or get a high rate from one, do not stop there. Contact and talk to several lenders.
Since most loan services base their decision to give you credit or not on your credit report, you should take a look at that report yourself. In the US, you are allowed to pull one credit report per year from the agencies that is free of charge and will not harm your credit. Do this to insure they offer the correct information.