Was this already determined previously? If so, I step back and appologize. It would just seem odd sending two prizes to the same person. Their multiple ticket purchases still played a part in the prize they did win. Again, not my decision to make though.
I don't care one way or another, but it certainly is not standard procedure as far as raffles go, so
everyone would have to agree, because I'm sure most assumed one ticket, one chance.
If the randomization procedure is used, then you don't have multiple drawings. In essence, all names are drawn and placed in order.
Makes sense to me to generate the list, and start down it, with each successive winner deciding which of the remaining prizes they want, and any repeats having the option to not take a second prize and let you move down the list.
This avoids a whole lot of deciding and debating.