There's a lot of information missing here, and it seems, well, just a little TOO lucky, if you know what I mean. The mention of "Secondary Winnings" from other tickets suggests he may have just bought too many tickets ...and may be working his own sort of system, still:
LINK: https://metro.co.uk/2018/05/15/ridiculously-lucky-man-wins-lottery-twice-in-a-week-7546237/
Of course, if you still deny the coincidence, there's always the case of the time the same numbers were drawn 2 weeks running in Bulgaria...
Nothing suspicious about that, and besides, they investigated...