Two blind women doing seance with letters mixed up. They spelled out the word cancer. I was there along with other ladies 2 kids, must have been about 15. We deliberately only let the mums push the glass IYSWIM? There is no way either of them could have seen the letters.
How to explain this? Well, without having been present its hard to know exactly what happened, and draw any conclusions. I'm sure Katie isn't lying, but the tendency is for people to remember things as being more impressive/convincing/inexplicable than they were.
The way that ouija boards 'work' is the ideomotor effect, - the people with their fingers on the glass ARE pushing it, although they do not feel as if they are. Therefore, each of the 15-y-o's present would swear (and be being truthful) when they say that they absolutely were not pushing the glass, - but they WERE pushing it.
Look at it this way, - if the glass really was being moved by spirits, then why doid anyone need to touch it at all?
The glass spelled out 'cancer' and within a year two of the people were diagnosed? That is just a coincidence, - sadly, one in three people will develop cancer in their lifetime.