The change is due to the multi-mode receive option that appeared a
year or more ago in one of the 1.8.x versions, the sync indication
shows the mode that was last detected when multi-Rx is enabled (this
can be multi-threaded or single-threaded depending on selection too).
The Tx mode used is as selected, I think if multi-Rx is not selected
then the sync box will mirror the Tx mode but I will admit I have not
tried this since the multi-Rx code became reliable and my memory is
Hope this helps, and I hope you enjoy the newly-released version 1.9.1
which is full of nice new features and code clean-ups with Mooneer as
usual working his magic.