Between you and Cyrus, the answer is revealed. Wyndham uses 00999 when creating a new account that stems from a resale trade, and a different numbering convention when creating a new account that stems from a developer sale. Any new contracts added to an account will not change the account number, so you will have 999 with developer sold contracts and even VIP levels, and 000 with resale contracts. To get hypothetical, it isn't impossible to have a 00999 account that is all developer after an owner has divested the resale contract that started the account, or for a developer numbered account to be all resale if for some odd reason an owner has decided to give away the contract he paid $20K for and keep the one he paid $1 for (I said hypothetical, after all!).