Hi Dodgepot
Thanks for your attempt to explain, but I'm afraid it's not common sense to me at all. I thought, maybe, that any letters in the 5th and 6th rows would be muddled, so in your example, i'd be expecting TOPGXYROT.
I don't really understand what you mean by "two cells overlap"- surely cells themselves can't overlap?
Sorry if I"m being extra dim!