difference between monthsBetween() Function and subMonth() Function

difference between monthsBetween() Function and subMonth() Function

Hi,

Using the monthsBetween() function if I set the start date for the 02-Jan-2016 and the end date for 01-Feb-2016 it will return 1. Is this the default behavior, should it not return 0?

https://creator.zoho.com/appbuilder/andrewcorkery/springboard-billing/form/Desk_Reservation/workflow/edit
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If I use subMonth(1) function on 01-Feb-2016 it returns 01-Jan-2016 as expected.

Please fix this.

Thanks,
Damien Cregan
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