Credit Consumption

I have read the wiki about this and just had a few further questions

I already have 1 holding in Fornebu, If i open another one in stapleton will my credit consumption be 6 credits a day ( 4 for fornebu and 2 for stapleton )

I tried opening another holding in Nicosia a few weeks ago but I found my credit consumption rose to 8 credits a day ?

The "two credits for every following holding" rule does only work with two holdings on the same server. So, if you have two holdings at Fornebu, it will cost you six credits, but having two holdings, one on Fornebu and one on Stapleton, will cost eight.