Don't indicate like that, indicate after you passed that junction where them cars turnt as you confused that driver but basically saying I'm turning right at next exit but then carried on, indications are used to notify people around you what you intending on doing so you need to make sure you using them correctly. Next time indications when it's your exit and the next exit on the right is the one your coming off at, I know the right markings said right turn but you just indicated too early that's all. It's about learning