I created a library containing 6 custom content types derived from some base ones: Article (base: Wiki Page) MyDocument (base: Document) MyDocumentSet (base: DocumentSet) MyPresentation (base: Document) MyImage (base: Image) MyVideo (base: Video)
I customized the list view so it could show the ContentType column.
The problem is when I create MyDocument or MyPresentation items, the ContentType column show that they have 'Article' content type. For others everything's fine. The most interesting thing that when I change the default content type for the library in SP designer, newly created MyDocument and MyPresentation take it instead of 'Article'
I checked ContentType IDs in elements.xml of each item - everything's correct there.
What could the problem be? The sharepoint version is 2013. Thanks