Really? I thought I saw a similar gap (of 2 days) between the first two updates a few times on this thread. mshastri, in a post below mine, has the same dates too.
If it helps, I sent a US masters degree from a well known university - maybe this is the reason why? There was only one document (transcript) to review.
Also, I noticed that they also added my Indian BE degree documents to the list of documents reviewed and accepted. I did not ask for it to be evaluated, nor did I mention it or send any documents for it. They must have linked my current application to an evaluation of my BE I had got done in 2013 before I went to the US for my masters. I had used a different email address and WES account then, so I'm surprised they linked it.