Issues with the Access Levels

I have several access levels and some members will need to belong to more than one.

However, even if they have more than one access level added to their account, they can't see more than one level.

For example:

The Free level can see pages 1, 2, 3, 4, 5
The Year level can see pages 6, 7, 8, 9, 10

But if a person has both the Free level and Year level, they can't see pages 1, 2, 3, 4, 5

Please advise.