Thank you for your question, Matt.  It is really difficult to make out much detail in your photos, since there is so much in the background.  Taking a photo against a piece of white paper would be helpful.  Having said that, curling of leaves is typically caused by insects such as Aster leafhopper, and aphids, among others.   One source indicates:  "Many insects feed on the foliage, including leaf beetles, the larvae of leaf-mining flies and fruit flies, plant bugs, stink bugs, lace bugs, aphids, leafhoppers, and the caterpillars of several butterfly and moth species. Other wildlife use asters to a limited degree."

 You'll need to examine the undersides of the leaves to see if you find the insect.  If you do, we can recommend control varieties.  Good luck!