It's crazy, "_imp___" symbols cannot exist if you don't define SFML_DYNAMIC.
I'll try to take a look at your project.
This might be a silly suggestion but have you tried to recompile SFML?
I had the same problem (or similar) and recompiling solved it.
I don't think so. The problem here is that its project setup somehow makes the linker expect imported functions, which are not in static libraries (imported == dynamic libs).