The lag in updating time is apparently a known issue in the 1.4.13 beta version that is being worked on. My experience is very similar to yours with the watch time indicated being wrong.
I am hoping the next beta will be out relatively soon since designs from the 1.3.13 (stable) version can’t be imported into 1.4.13, so spending time on new designs in 1.3.13 will be re-spent to a degree when recreating the design in 1.4.13.
I think WFS is a great tool and the people working on the releases should be congratulated - looking forward to the next release!