jm ãÏ1H tFØQÐjuöèôÙQô±@|ò¨_L¥Poloniex does not have 3. Before the fork they had BCH, then they had BCHABC and BCHSV futures.
At the fork, all BCH turned into equal amounts of BCHABC and BCHSV.
https://whatsonchain.com/tx/7d540a15e650e7ba453d73a6c622df6fb7ce88379c4bd2e24b2285e637c78ec1