Rayyan will also keep track of exclusion numbers and display them on the left hand side of the screen in the 'exclusion reasons' box. This will be very useful for your PRISMA diagram at manuscript time, i.e. how many articles were tagged with each different reason for exclusion.
While screening is blinded, the numbers shown will be for your screening results only. When blinding is turned off, the total numbers of articles for all screeners will be displayed.