Companies run on projects and tasks. In some companies, particularly big ones, project management is formal and disciplined. There are people hired solely as 'Project Managers' and their job is to make sure the project is successful and 'herd the cats'. It's a real skill for large, complex projects, and it's valuable for small projects too, even if the project manager has other responsibilities on the project). At smaller companies (or larger mis-managed ones), project management is haphazard, there's no one person specifically in charge and even if people are aware the project is off-track, no one does anything about it until too late.
Maybe you think that because you worked on a couple of projects in college with other people that you know all about working on teams. Problem is that college projects are usually measured in days or weeks. In business you could be working with the same people for months or years. The annoying things that your project partner did in college will become reasons for justifiable homicide if you have to put up with them for a year. You need to learn how to deal with frustrating and difficult people so you can handle it.
