SimpleDB nullable field orderby

This question is similar to one that Joe asked previously.

I'm using Lightspeed with Linq in C#3.5 while connecting to simpleDB

Say I have a domain with a nullable field.

If an  Iqueryably is created such as:

var queryable = Context.Enttity;

queryable = queryable.OrderBy(e => e.SomeNullableField); 

var count = queryable.Count(); 

//gets the current *page* of entities

queryable = queryable .Skip((page - 1) * rowsPerPage).Take(rowsPerPage);

return queryable.ToList(); 

What I find is that the count still represents the entire set (of Context.Entity) but once the OrderBy is performed, Only those that have a value in the nullable field are returned with the set. 

If the skip is performed on a later page (which should result in only those that are null in the nullable field) i get the following error:

System.Reflection.TargetInvocationException was unhandled by user code

  Message="Exception has been thrown by the target of an invocation."

  Source="mscorlib"

  StackTrace:

       at System.RuntimeMethodHandle._InvokeMethodFast(Object target, Object[] arguments, SignatureStruct& sig, MethodAttributes methodAttributes, RuntimeTypeHandle typeOwner)

       at System.RuntimeMethodHandle.InvokeMethodFast(Object target, Object[] arguments, Signature sig, MethodAttributes methodAttributes, RuntimeTypeHandle typeOwner)

       at System.Reflection.RuntimeMethodInfo.Invoke(Object obj, BindingFlags invokeAttr, Binder binder, Object[] parameters, CultureInfo culture, Boolean skipVisibilityChecks)

       at System.Reflection.RuntimeMethodInfo.Invoke(Object obj, BindingFlags invokeAttr, Binder binder, Object[] parameters, CultureInfo culture)

       at System.Reflection.MethodBase.Invoke(Object obj, Object[] parameters)

       at Mindscape.LightSpeed.Linq.ProjectionStrategy.ExecuteEntityQuery(Query query, IUnitOfWork unitOfWork)

       at Mindscape.LightSpeed.Linq.ProjectionStrategy.Execute(Query query, IUnitOfWork unitOfWork)

       at Mindscape.LightSpeed.Linq.LinqQueryExecutionPlan.Execute()

       at Mindscape.LightSpeed.Linq.LinqQueryTranslator.Translate(Expression expression, IUnitOfWork unitOfWork, String viewName)

       at Mindscape.LightSpeed.Linq.LinqQueryProvider.Execute(Expression expression)

       at Mindscape.LightSpeed.Linq.LinqQueryProvider.System.Linq.IQueryProvider.Execute(Expression expression)

       at Mindscape.LightSpeed.Linq.LinqQuery`1.System.Collections.Generic.IEnumerable<T>.GetEnumerator()

       at System.Collections.Generic.List`1..ctor(IEnumerable`1 collection)

       at System.Linq.Enumerable.ToList[TSource](IEnumerable`1 source)