Does mam know that you're starting with jetstar? Wouldn't they be a bit funny with you starting and knowing that? I have no idea how it works but if they know you start Monday, from a company point of view wouldn't they find it strange you'd start then leave?*
Like I said I have no idea. I just thought if one was offered 2 positions I'd keep it a secret to the other company vice Versa.*
But I guess you had no idea MAM was going to offer you a spot which you couldn't have done anything about it guess. Good luck though!