There is one bc pill that takes a month - I just can't for the life of me remember what it is called - I think it is one of the tri-phasic pils - definately not one of the usual mono phasic pills.
On the whole it is 7 days - and if it says 7 days in your leaflet - then why disbelieve it - that leaflet is there for factual information about your medication.
The six hour one hour thing is different types of pill.
If you are using a normal bc pill then you have a six hour window in which you are still safe if you forget your pill and take it late.
If you use a mini pill or pop (progesterone only pill) then you must take it within 1 hour of your usual time each day.
Always check the leaflet in your pill box as that will give you the most accurate information for your specific pill.