Gosh, where was I when all this was happening??? My favourite subject!!!
Well, firstly, (and I hope Bundy comes back to read this...) any other pythons in the same enclosure with an incubating female will continually disturb her - females trying to hijack the clutch for themselves on occasions, and both sexes trying to utilise the warmth produced by the incubating female by coiling with her. Males will occasionally attempt to mate with a female post partum as well. All of these will distract the incubating female from her task, so all other snakes must be removed from her enclosure.
The hybrid debate is always emotional, as is the "intergrade" debate - the term intergrade implies that there were once coastals, and diamonds living in separate populations, and the came together and "hybridised." This is probably not true. The Morelia spilota ssp found from northern Victoria right up the east coast is a continuum with local variations as their environment dictates. So-called "intergrades" are just a local carpet python variation (as are diamonds) and could have existed in their own right just as long as the others with which they are supposed to originate from. Port Macquarie carpet is a far more appropriate name for these animals.
Jamie.