Ah, sorry.
In that regard you can read here what will be transferred with a CSW and what not:
In terms of reward I don’t care who is doing a CSW when and how.
I’ll give the reward on player location based.
So if you played on both servers, on both servers the rewards are given and it might risk an overwrite, yes.
I can’t do this convenience goodie on top or it would be a full time job.
For those affected it means you have to login first, use the rewards to the degree you want and then do the CSW, after you used the reward.
Use can mean buy stuff, convert stuff, put it in a container with a lock code to retrieve it with your future version from CSW.