@Suty @Suty Did nothing on the PC. Have 3 of each favorite. On the mobile device it synced up. Now I have 3 of each there as well.

@Suty Yes, I use the same account on both laptop and mobile. It just happened again. Had to add them again on mobile, but they just added to the PC, so now I have 3 copies of the same location on the PC.

Today all my favorites were gone in the Android app. I added them using the confusing instructions provided. When I went to Windy on my PC, my old favorites were still there along with the duplicates I just created on Android.