Just call them. I have been using PP for 10 years and have had nearly zero problems. Their site runs on a programmed system and as such it will have glitches. Here is the number 888-261-1161 and 479-857-4117 - when you get a person they will fix it for you manually.
As for the warnings from PP it's probably people reporting them.
Also, it's not inconceivable that PP is looking for patterns like a bunch of small payments of exactly the same amount in a short period of time.
I think you guys should not call your sales raffles. Call them group ownership and the person whose number is picked now has the unlimited right to use the thing forever.