http://tolweb.org/Amniota/14990
you checked that?
according to the references turtles position has been in question for a while.
it could just be that they removed reptilia and synapsida anapsida and romeriida just branch of amniota now without there being a heiracy to them.
but yes if they have removed aves as a catorgory then that site is not uptodate.
personally i think the problems with classification just come from attempted to put things in boxes. it's like trying to name rivers where does one end and the other begin.