rsync tries to copy although file is copied - find

Question

I'm trying to understand the following, maybe one of you guys can help me out by explaining on what exactly happens here:
My goal is to write a script, which copies files from the find-command, parallels rsync-commands and backup those, by re-creating the folder-structure from the source on the destination as well.
Somehow my initial script does not work like that, and i don't really have an idea on how to fix it to behave that way.
Initially, i've copied the files with "ls -1 /foldername" as sourceFolder, which is not best-practice. So i've tried to change it to using "find" as described beyond.
find "$sourceFolder" -maxdepth 2 -mindepth 2 -print0 | xargs --verbose -0 -I {} -P $maxThreads -n 1 rsync -valhP {}/ "$destFolder"/ --checksum --human-readable --stats --dry-run >> "$logDir"/result.log
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If i run this script, it literaly would recopy the file(s), although those exist in the destination folder i would expect it to be.
sending incremental file list
.d..tp..... ./
>f+++++++++ macs.txt
Number of files: 2 (reg: 1, dir: 1)
Number of created files: 1 (reg: 1)
Number of deleted files: 0
Number of regular files transferred: 1
Total file size: 242 bytes
Total transferred file size: 242 bytes
Literal data: 0 bytes
Matched data: 0 bytes
File list size: 0
File list generation time: 0.484 seconds
File list transfer time: 0.000 seconds
Total bytes sent: 83
Total bytes received: 22
So as it turned out, sourceFolder and destFolder have to match, and i can't run anything like sourceFolder/folder1/folder1a destFolder/.
Can anyone help me out on what's wrong and why it behaves like that?
Thanks a Lot,
M.