Excerpts of the DIY Bible Study (Textbook and Video Collection), such as the recently featured DIY Philippians, need to be marked as owned for those who own the larger DIY course, otherwise people will buy something they already own.
This issue of course affects dynamic pricing of bundles where the smaller excerpts are included, such as https://www.logos.com/product/80494/lexham-press-philippians-bundle
(related thread: https://community.logos.com/forums/t/126206.aspx )
EDIT: it would help if the product page of the excerpt also shows that it is part of the larger DIY course bundle.