The volume isn't iPhoneringtonemakers fault. Thats just the file you picked. I've had it work great so far. A few did need me to send the ringtones a few times, but it's better than the default garbage.
I was only unable to keep two ringtones at a time no matter how many I uploaded it would only keep the last two. And If I uploaded the entire list, the names of the ringtones would be different but the same song. But after I jailbroke my phone yesterday it took as many as I asked no problem