Would give you 2 separate contracts.
June xx 2009 would be your 11 month Home Resort booking window at SSR for reservation(s) beginning on May xx 2010 so you could book up to the number of nights 160 point contract would cover as one reservation and then have a second reservation you could book up to the number of nights 100 point contract would cover. It's not guaranteed but MS will do their best to link & note connection of these 2 reservations so you'd hopefully avoid having to switch villas.
Or you can transfer points from one contract to other and have one seamless reservation; just keep in mind that you are only permitted one transfer per account per Use Year so the transfer 'out' of points from 1 contract would be that account's one transfer option for that UY and the contract receiving points 'in' would be using its one transfer option for that UY as well. Transferred points must be current Use Year points ( they can't be points that have been either banked or borrowed) but once transferred you can bank them.
Also, keep in mind you will have 2 different Banking Deadlines - for August UY its March 31,
for April UY its November 30. If you do transfer points between contracts those transferred points retain their original Use Year should you wish to bank them.
Good luck with your planning
