Hi. Bar code scanning of the Powers series TP places 3 of the 14 volumes that belong to the core title “Powers TP” under their own unique titles. Either all 14 books should be set up as independent titles in core using the subtitle of the trade or these 3 volumes need to be incorporated under the main and their current titles removed. I have all the books and am happy to help in any way needed. I’ve included a wiki link that shows all 14 volumes: of note is how the series changed publisher part way through which may have been a factor for this split in the first place (but it’s not consistent in core using that logic either). Thanks!
