Forum:Future fusion + jinzo

I've been having a lot of issues with this combo as too if it is legal or not. I play future and send my 3 jinzos and returners to get my 3 jinzos out but here where I play they keep telling me that no matter how many I send to the graveyard only one comes back. Is this true? Because future resolves there, nothing else happens until the 2nd stanby phase. But they do accept summoning jinzo by dumping returner with fortress even though I tell them it misses the timing because of the special summoning of fortress. Which is right or wrong??