Apache SolR and multi-site Drupal

Hi,

I use Drupal Multi-site (https://drupal.org/documentation/install/multi-site).
I want to allow each site to use is own index.

I created 2 SolR indexs called collection1 and collection2.

I puted onto Drupal conf url like this: http://localhost:8080/solr/collectionX
Drupal Module creates index into the right collection.

But Site2 with indexed data onto Collection2, used collection1 as search index !

I think it's a bug because i'm able to index to the right collection, but perhaps a configuration problem occurs.

Thanks