top slice setting in unconfined aquifer

hi,
I set the top slice of my unconfined domain as free and movable. After runnimg the model in Feflow 5.2, for multi species for 100 years,
I wanted to check the model  further so from the .dac file i go to the fem file after rehas command but the properties such as reaction rate and henrys coeff all changed,
All chemical species now had same value of reaction rate and coeff as the first species.
why?
this however does not happen when I use the top slice as pheretic.
pl can u explain this ??
faby

I would assume this a bug. Have you tried installing the latest available patch for FEFLOW 5.2. As this version is relatively old, the patches are no longer available from our website, but you can obtain them by contacting my colleagues at support@dhi-wasy.de.