Right Activity Level?

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I've been using MFP for about 4 months now and managed to drop from 15 Stone 3lbs to 11 Stone 12lbs, with a target of 11 stone 10lbs. For all of this time I've had my actiaivity level set to 'lightly active' and consumed no more than 1660kcal p/d. I'm starting to think I've set the wrong category! I'm a teacher, so on my feet most of the day apart from the summer break of course, and also run daily/every other day from 5KM to 11km.
My exercise for the last 7 days has been:
Wed - 9.3km run
Thur - 7.4km run
Fri - 5.8km run
Sat - no exercise
Sun - no exercise
Mon - 9.3km run
Tue - 5km run
Today - 10.1km run

Should I set it up to 'active'?