This site is full of scammers, maybe even worse... i got 2 emails: one from a woman (?) who was literaly giving me the "job" even if we had never ever spoken together, one from a "dad" who said he offered £2500 at arrival + £400pw to look after one child 15 hours per week; he attached photos that looked just fake as hell. Be very very careful because it might be full of insane people, perhaps some of them don't only want money from you...
To find a family, I recommend Aupairworld, I already found 2 honest and real! Families through that site and worked for both of them for several months each. If you want to go far from home, contact an agency, it's safer. But seriously, stay away from that site.