Strange PEP behavior!?

Hi,

I want to publish something using PEP (XEP-163).

E.g. User "111" publishes:

<iq id="123" type="set">

<pubsub xmlns="http://jabber.org/protocol/pubsub">

<publish node="http://jabber.org/protocol/tune"><item><tune xmlns="http://jabber.org/protocol/tune"><artist>AC/DC</artist></tune></item></publish>

</pubsub>

</iq>

User "222" is offline. When he comes online (with resource "test"), he receives TWO (!!) messages (which are slightly different though):

<message to="222@dev/test" from="111@dev" id="111@dev__222@dev__xyQI9">

<event xmlns="http://jabber.org/protocol/pubsub#event">

<items node="http://jabber.org/protocol/tune">

<item id="05fbd9e5-0f94-43a9-8ef4-839b5bf640ee12">

<tune xmlns="http://jabber.org/protocol/tune"><artist>AC/DC</artist></tune></item></items>

</event>

<delay xmlns="urn:xmpp:delay" stamp="2014-02-04T20:29:33.616Z"/>

</message>

<message to="222@dev" from="111@dev" id="111@dev__222@dev__be5KJ">

<event xmlns="http://jabber.org/protocol/pubsub#event">

<items node="http://jabber.org/protocol/tune">

<item id="05fbd9e5-0f94-43a9-8ef4-839b5bf640ee12" node="http://jabber.org/protocol/tune">

<tune xmlns="http://jabber.org/protocol/tune"><artist>AC/DC</artist></tune></item></items>

</event>

<delay xmlns="urn:xmpp:delay" from="dev" stamp="2014-02-04T20:29:33.618Z"/>

<x xmlns="jabber:x:delay" from="dev" stamp="20140204T20:29:33"/>

</message>

I don't think this is normal behavior, I can't find anything in the specification.

And on the other hand, if the user is online, he will only receive one message.

Comments?