It looks like the Stop Viewer is showing both arrivals and departures at the end of lines, regardless of a layover. See screenshots below.
Note the back-to-back Line 14 entries at 3:28 (both are for block 1441)

Here is same view in production

Here's an example where there is a layover, so not as obvious. The 3:09 is the arrival at the TC, whereas the 3:27 is the departure - we just want to see the latter.

And here is the view in production
