Make it a higher priority to work with Ebook Central on deduplication, titles missing from Summon etc.
Some Ebook Central titles do not appear in Summon, while others appear multiple times. Some are not linked with the library's print title. Work with Ebook Central to reduce the incidence of these errors.
We are working with Ebook Central on these issues. This is an ongoing process and will continue to work on this as necessary.