made1686 - Knowledge of the stockmarket, simple arithmetic and logic clearly are not your strongest points ;-)
No the T trade referred to was not what you're talking about, which is an extended-settlement trade. The T trade the other day was not extended settlement. I can't be bothered to explain what a T trade is other than using the jargon term "Single Protected Trade". Ask your broker (if you've got one!) what that means.
So you're "only" 3p out on CEY. Er, the difference is 15% on a share at that level. On the same basis, your prediction of WMK being £1 would make it nearly £1.20. Quite a difference.
I'm afraid that we all remember your confident prediction a few days ago that "the price will drop like a stone" when it goes XD. OK, a halfpenny rise was no great shakes, but it did make your prediction look a wee bit silly, didn't it?