I'm not a programmer

But the stuff of getting an item twice on the same level is nothing new. Finding in item increases the chances of getting it again in that game, again at that level in later games and as far as I know also again in any level of the next games. In most cases this effect applies to coeff. 1 or 2 items, but if you are lucky, you can also find coeff.5s more often...
And no matter what part of the clock your random generator uses - you can't control anything using this effect because you don't know how this time is used exactly.