Aisleyne chose her fellow guests (so effectively choosing the staff by elimination), so there were natural similarities to the nominations.
Not all of the "staff" are up for eviction: Cristian got one nomination and is staff, while Danny also got a nomination and is a guest.
We'll see for certain tonight, but the rumour on DS and elsewhere is that the delay in opening voting lines is not due to a twist, but rather down to a change in Ofcom's rules regarding how TV companies advertise the cost of telephone voting. This rule change takes effect today...
http://www.mirror.co.uk/money/...harges-phone-5593311