In earlier confluence versions, page version delete causes the higher page versions to be reduced by one, meaning that at a certain point of time, we will always have 1 to n versions (See API documentation). However, at later versions (at least 7.18.x) this behavior is gone in a way that a version delete does not include the change of any other version. This new behavior is not communicated in any release notes. Is this an intentional change or is it a bug?