Ok I can see whats going wrong.
First off you need to make sure all your weather symbol tags end in 100:0$ - some of yours (mainly the duplicates I think) use 100:50$. Change that first.
Secondly on your duplicates you need to change the number at the start of the tag $#WCCI#==01?
For the whole weather to work properly you need to cover the numbers 01, 02, 03, 04, 09, 10, 11, 13 & 50
An example here: Your 'Snow.png' layer has this tag: $#WCCI#==13?100:0$ - this is correct
however your 'Snow 2.png' layer has this tag: $#WCCI#==13?100:50$ - which is where it's not working - you need to change the 50 back to 0 and change 13 to one of the other numbers listed above.
As a reminder these are:
50 - Mist: $#WCCI#==50?100:0$
13 - Snow: $#WCCI#==13?100:0$
11 - Thunder: $#WCCI#==11?100:0$
10 - Rain: $#WCCI#==10?100:0$
09 - Shower: $#WCCI#==09?100:0$
04 - Broken cloud: $#WCCI#==04?100:0$
03 - Scattered cloud: $#WCCI#==03?100:0$
02 - Cloud: $#WCCI#==02?100:0$
01 - Fair: $#WCCI#==01?100:0$
You need to make this change to all your copied layers changing the weather number each time to the suitable one.
If you'd rather not have your watch face published you can now duplicate it in the creator which will create a copied draft version and delete the live one.
Hope that all makes sense. If you follow the above you should be able to nail it.