When did you arrive previously? We've arrived Tuesday evening the last couple of times (sadly not this year) and been routed in via Purple but they were sending everybody through up towards car parks 1 & 2. I know they continually switch up what they're doing so never a guarantee they'll do the same thing twice, or be doing the same thing 5 minutes later.
On Wednesday mornings before we have also managed to skip the first exit off the road and come in via Brown - as per the hiding your sticker until the correct point idea - they can't really force you off the road!
I think it's just queue battle-scars, and if I'd been in different places in the same years then I'd hate something else instead - but I really hate gate B. From car park 2, the last couple of times on Tuesday evenings, we've trek'd cross country to walk in through the campervan fields for gate C (ultimately going for Big Ground field) to avoid it.
