ID's of partials within partials are malformed

Currently partials within partials add an extra "p" to the front of the nid portion of the ID

An example ID of a stack contained within three partials:

partial(251) -> partial(4) -> partial(4) -> stack(2)

stacks_in_ppp251_n4_n4_n2_page5

The expected behavior should be this without the extra p's? or perhaps something else similar.