Multiple memcached instances : data stored only in one instance

[kbenhdech]

Hello,

I have specified two memcached instances in file environnement.conf

memcached.1.host="localhost:11212"
memcached.2.host="localhost:11211"

Via telnet I added an entry for key "toto" in memcached server with port 11211, no entry was founded in my application,
if I add an entry for key "toto" in memcached server with port 11212, one entry is founded in my application.

I think the cache return value's key of one server, 11211 or 11212, if found from them in one.
This is the normal behavior or this is a bug ?