A professional graphic designer will create your logo in Illustrator, not photoshop. please make sure when you purchase a logo you are receiving a VECTOR format of your design, a PSD layered file is not the correct logo format.
Whoever wrote this must NOT have been a graphic designer because all of these things are used in different mediums of graphic design. Also if something is for designers, make sure your design is damn good. The Skills Required To Be A Good Designer.