roundabout info needed

ok this maybe a strange one but can someone tell me if im right or wrong…

A1/M18 ‘NEW’ interchange… driving north along the A1 I enter the slip road, two lanes 1st being turning left to go M18 towards M1/ Rotherham. 2nd being A1 strait ahead or M18 towards Doncaster / M80… am I right by saying I can hug the inside lane and take the 3rd exit to go to M18 Doncaster / M80■■? a few times I have been at the lights now indicating left to turn off and both cars and trucks have cut me up. the Doncaster M18 now has two lanes going from the roundabout… I hope you can understand me if not just say so and ill try and explain better.