[TYPO3] Mount from groups and DB Mounts don't work together

[Bing Du]

Hi,

Typo3 4.0.6

Maybe it's working as designed, but I wanted to make sure I understand it
correctly.

We created a user group (groupA) that has access to all the pages of a
site (siteA).  Now we have a user that we just want her to be able to
access the front page only of the siteA.  This user has her own group
(groupB) which works with a different site (siteB).  So I checked 'Mount
from groups (DB Mounts)' for this user.  In 'DB Mounts' box, I selected
siteA's front page.  But this user can not see siteA's front page as I
thought she should.  Looks like if Mount from groups is in place, DB
Mounts won't work.

To do what I needed to do, I had to create a new group which has access to
siteA's front page only and put the user in this group.

I'm thinking if we have more requests like this that some people only need
to access a single page on another site, we'll end up creating a lot small
groups.  How do other people deal with such kind of situations?

Thanks much in advance,

Bing