If you're refering to http://www.firecoinpool.com thats not the multipool that hashes your coin. From what I understand it piggybacks off of other multi-pools and turns your earnings into firecoin via automated buys on the exchange. I mine x11 at WafflePool and point firecoinpool to it.
WafflePool, as of right now is hashing x11 at 5.35 GH/s, but as FireCoinPool states you can use ANY multipool (but their preference is Wafflepool and NiceHash). The hashrate on FireCoinPool relates ONLY to hashes that have their profits converted to FireCoin.
If you have any other questions please don't hesitate to ask!
Cheers,
- VR