I don't know what Lama Wangdu's relationship with Swami Chetanananda is like, but it does seem that the latter is encouraging his students to learn chod from the former. There has been some kind of collaboration between the two for years now, but what that is, I have no idea.
I also don't know if that 2008 blog post has been fact-checked or if its claims have been verified. I do know that there's been controversy of that kind surrounding Swami C for a long time, even prior to that mass departure of students.
Great River Tendai Sangha: a Tendai Buddhist community in Alexandria, Virginia, USA (near Washington, DC):