Struggling to meet carbs requirements

So I've been logging my food and exercise for 20 days now and I'm really finding it hard to meet my carbs requirements. My goal is to gain 1 lb a week and it tells me I need to eat 286g of carbs every day and just 86g of sugar. The problem is meeting BOTH of these at the same time. Usually by the end of the day I find I'm under my carbs requirement but over my sugar requirement. So what I do is eat sugary foods just to get to 286g of carbs but I'm always way over my sugar limit.

Obviously the problem is that sugar is a carbohydrate and any carbs I eat will also increase my sugar. I just think that the difference between 286g and 86g is too high so it's basically impossible for me to meet both. I always eat rice for dinner but it's never enough. So could anyone give me tips on specific food I can eat? Also, whats so bad about going above the sugar limit?