SQL 2012 :: Tablediff And Nvarchar (max)

Using MSSQL Server 2012 Standard on a Windows 2008R2 Standard server.

For the tablediff utility MSDN says:

The Transact-SQL script generated to bring the destination table into convergence does not include the following data types: varchar(max), nvarchar(max), timestamp...etc

We have a small replication job running and one of the tables contains a timestamp field. After running tablediff the generated script contains a note:

-- Column(s) AccessTS are not included in this script because they are of type(s) text, ntext, varchar(max), nvarchar(max), varbinary(max), image, timestamp, or xml. Columns of these types cannot be updated by tablediff utility scripts; .....

The updated record is in the script file, but the timestamp field is omitted.

All good so far.

However, another table contains nvarchar(max) fields. The scripts that are generated for these tables do not contain the above message and instead contain these nvarchar(max) fields in both the update and insert into statements!

So why does it say it will ignore these types of fields, but then actually include the nvarchar(max) ones in the generated scripts?