It could be worse: I once won the New Statesman crossword, and a few months later the same grid came up in the ST!! So, I started checking, and there was a pattern. A NS croggy would turn up in the ST after about three months.
I also wonder why an answer turns up in Xwords in several papers within a few days. Are all the setters using the same computer programme, or are all the X-words created at a centre and bought in? I shall scream if NYALA tryns up againg in the Telegraph, or EXpress, or......