my supervisor wanted me to write a chapter on the work done so far. I have got an email back saying that she wants it in the context of the report. I really dont get what she means.... I thought it was in the context of the overal report...

does she mean "context of A report" - thus producing a report on work done so far?

Sounds like you should write it up similar to how a chapter would be in your final thesis i.e intro, method(s), results, discussion/conclusions.

Supervisors are normally particularly vague and then when you ask to clarify then apparently you should know and they start laying into for not knowing.

Or perhaps that is just my supervisor?

(Take 2: With punctuation)

Supervisors are normally particularly vague, and then when you ask for clarification you are in the wrong. Apparently you should already know.

Or perhaps that is just my supervisor?