Signage change causing delays at peak times

Lane desination sign with 1 miles ques on change previously is causing 5 - 10 min delays entering roundabout which did not previously occurre. Main traffic flow is for banbury and previously sign marked both lanes to exit for a422 banbury. Sign and lanes should be left lane a422 Brackley, m40 south, a422 banbury. Right lane should guide drivers to inner lane of roundabout to a422 banbury and m40 north. It's causing unneeded que, wasted time, productivity and pollution from standing vehicles. Thanks for your time and looking into it :)