Idp initiated SLO with multiple session indexes

[Rod Widdowson]

> We are a SP and customer is an Idp.
> Everything works fine, SSO, SLO except one case of Idp Initiated SLO where:
> - user login to Idp
> - Access application H1 -A , H2 - D (Session gets created in SP as well)
> - Now he does SLO from Idp

Sounds like a question either for the SAML spec list or the shibboleth users list.  It also doesn't make much sense to me:

> our customers has 
> Hostname HI with multiple applications A,B,C 
> Hostname H2 - D,E,F
>
> We are a SP and customer is an Idp.

An IdP, but multiple host names?  What does that mean?  Multuple IdPs?  What does SSO (let alone SSL) mean in this context?