Howling:Dalek history question

Okay, so the Fourth Doctor changes the history of the Daleks in "Genesis of the Daleks", so that things now happen differently to how they happened before. He states that he's set their development back by about a thousand years in the story. Logically, all the previous Dalek stories would be affected by these disruptions in the timeline. Does this mean that in the new timeline, the Daleks don't necessarily invade Earth in the 22nd century? If so, what became of Susan, who stayed behind on war-torn Earth to help rebuild? Being a Time Lady, does she remain the same, but reality alters around her? And then there's stories like "The Evil of the Daleks" and "Day of the Daleks." Both stories involve Daleks travelling from the future into the past, but now that the timeline those particular Daleks were part of may well no longer exist thanks to the events in "Genesis", are the events of these stories now suspect? Does Victoria's father no longer draw the Daleks to 19th century Earth (then what's happened to Victoria? Has her personal history changed?), and do the Daleks no longer battle UNIT in the mid-20th century? The Doctor, of course, will still remember these adventures, but will other people? EJA 16:22, April 12, 2011 (UTC)

Oh, and in "The Five Doctors", Susan is wearing Earth style clothes, suggesting she was living on Earth at the time she was picked up by the time scoop. I just thought I'd mention it. EJA 09:29, April 13, 2011 (UTC)