I'm not sure what you are asking and the 365 day but its the same as if yiu were reserving your week, it needs to be 365 days from check-in.
As for splitting the week into shorter stays, you get charged one extra $29 fee from Marriott customer service but not for every split reservation so if you broke it into more than 2 stays you would only get charged once. Interesting about that though is the Marriott customer service will tell you the CH will charge you for the extra reservation but the CH told me that wasn't true.
As for the cleaning charges if you split, from what I understand you won't incur any cleaning fees either but that I'm not 100% sure of.