I have posted about this previously but the fact that 2 payments have been taken is correct.
They relate to March & April because the fees became payable as soon as the community was set up.
Future payments should go through on the 1st of each month.
There seems to have been a bit of a delay in the payments being taken as Luis advised me that one (for march) would be taken on the 31st March & the one for April would be taken on the 10th April.
Noreen