Hi fargel - The insects are aphids - you can also see the white molts where they have hatched. They are attracted to excessive nitrogen in plants and suck nutrients from the leaves and stems. A few won't harm the plant but a bad infestation can kill it. Check the undersides of the leaves for aphid gatherings. ;) The link below tells you all about them. Controls vary and include just blasting them off with water and insecticidal soap sprays.

The leaf roll is most often a result of inconsistent watering levels and is common with container plants as it is difficult to maintain consistent moisture in them. But it can also be caused by excessing watering if the soil does not drain well. You can search "leaf roll" here and find several discussions on it. It doesn't affect production and can usually just be ignored unless it becomes severe.

You can safely remove the yellow leaves (also a sign of watering problems) but the rolled ones will do fine as is. They will straighten out once the watering problem is solved. ;) Good luck with your plants.

Dave

Here is a link that might be useful: IPM - Aphids