want to ask credit limit for amex & master is combine or seperate?

hi, want to ask online transaction on weekend has 5% rebate?
or need depend on the merchant?

example if i pay maxis, TNB, unifi using online on weekend, does it provide 5%?

if not then i think i will do auto billing is easy.
anyone know how to do auto billing without fill in the enroll form?

hi, want to ask the first month(if around 10day only) statement of cerdit card will combine with following month statement?

as what i see in my M2u web, the last payment is 1st July ( this is because rebate paid my bill).
minimum payment 0
outstanding : xxx.xx
statement balance balance: xxx.xx
payment due date: n/a
statement date: n/a

i heard first statement will send to corres address right? but it wont show in website?
as I wan to pay last statement bill to avoid interest but I do not know exact figure.