Is there anything wrong with having a few private methods exposing IQueryable<T> and all public methods exposing IEnumerable<T>?

I'm wondering if there is a better way to approach this problem. The objective is to reuse code.

Let’s say that I have a Linq-To-SQL datacontext and I've written a "repository style" class that wraps up a lot of the methods I need and exposes IQueryables. (so far, no problem).

Now, I'm building a service layer to sit on top of this repository, many of the service methods will be 1<->1 with repository methods, but some will not. I think a code sample will illustrate this better than words.

public class ServiceLayer 
{
    MyClassDataContext context;
    IMyRepository rpo;

    public ServiceLayer(MyClassDataContext ctx) 
    { 
        context = ctx; 
        rpo = new MyRepository(context);   
    }

    private IQueryable<MyClass> ReadAllMyClass()
    {
        // pretend there is some complex business logic here
        // and maybe some filtering of the current users access to "all"
        // that I don't want to repeat in all of the public methods that access
        // MyClass objects.
        return rpo.ReadAllMyClass();
    }

    public IEnumerable<MyClass> GetAllMyClass()
    {
        // call private IQueryable so we can do attional "in-database" processing
        return this.ReadAllMyClass();
    }

    public IEnumerable<MyClass> GetActiveMyClass()
    {
        // call private IQueryable so we can do attional "in-database" processing
        // in this case a .Where() clause
        return this.ReadAllMyClass().Where(mc => mc.IsActive.Equals(true));
    }

    #region "Something my class MAY need to do in the future"
    private IQueryable<MyOtherTable> ReadAllMyOtherTable()
    {
        // there could be additional constrains which define
        // "all" for the current user
        return context.MyOtherTable;
    }

    public IEnumerable<MyOtherTable> GetAllMyOtherTable()
    {
        return this.ReadAllMyOtherTable();
    }

    public IEnumerable<MyOtherTable> GetIna