I noticed a few things with your list.
1) Your projects do not appear to describe an outcome. A project in GTD is an outcome that you are committed to and able to reach within maximum a year. Some things in your project column look more like maintenance, and even more importantly, many of the things in the project column are not worded clearly as things you want to see true. Try putting things like "Organize email" as the project instead of just "automation".
2) Your context seem to specific to me. A good rule of thumb is to have as few contexts as possible, but not less. Try limiting yourself to only a handful of contexts, maybe 3-5. For instance, if you already have Online as a context, do you really also need Rabobank as a separate context. And if you already have PC as a context, do you really also need FireWorks as a separate context.
3) Your next actions do not seem like next actions to me. "How to debug WP" is not an action but a question, "Steven Covey" is not an action but a name of a book. Prices research also seems not like a next action, but more like a project in itself. Think "very next, physical, visible action" (i.e. what would I see you do if you where to do this thing right now).
4) Not everything on the list has a context. Sorry, they have to.
5) Does "group" mean anything to you? If so, then keep it. To me this looks similar but not identical to the GTD 20,000 ft Areas of Focus and Responsibility.
6) Quite a few things on the list are well phrased and thought out, so I can see that you do know how to put it. What I think you need is to be consistent in being very explicit about what wording you put down for every single step.
7) You seem like you could get much out of reading the book (again).
