Update, I've confirmed that the board software is doubling the destination thread's view count, and does not add the incoming thread's views.
So for example.. thread A has 1568 views, thread B has 95 views. Go to thread B, tell it to merge with thread A and the resulting merged thread has a view count of 3136 (double the 1568).
I have a feeling this bug has been present prior to V7.5 as I've seen some strange view counts from time to time on prior versions.