As long as your contract has not closed, you can ask that it be given in two separate contracts.
Many have said they were able to still get all the incentives that went along with the one large contract so I would not hesitate to mention to your guide that you are hearing that others are having it done.
I have also read that they are even letting new members split the 160 into smaller contracts at two different resorts.
I made changes several times to my contract before it closed and there was no issue whatsoever.
Good luck!!!