If you use the design manager to create a design package, it seems there is a problem during the export / import that corrupts page layouts. The result will be missing/corrupt content types. For example, if you create a publishing site you can create pages within that site just fine, but if you create a sub-site also using the publishing site and try to create pages in that site, you will be faced with an error regarding “Invalid Field Type”. This is because the page layout somehow ‘forgot’ a handful of the required fields. It would appear to be a Design Manager specific bug which no doubt Microsoft will address, but in the meantime.
More commetary regarding the issue as well as some fixes here: