Some properties are not updated, although no error was thrown.
A property compliance definition could prevent dataLoader from updating a property, which is derived from this definition. E.g. The Vault property company was derived from the file property company, when the file property was already filled.
Modify the compliance definition, but you should be very careful with this. In general these default compliance makes sense and shouldn't be changed. If you absolutely have to, keep the risk in mind.