I had my vehicle’s transmission fluid changed using AMALIE Universal Synthetic ATF. Conventional transmission fluid was used for all previous changes. Will this cause a problem?

The AMALIE Universal Synthetic Automatic Transmission Fluid was tested for compatibility with other conventional type automatic transmission fluids. Data gathered during field testing shows that mixing our Universal Synthetic fluid with conventional type automatic transmission fluids, in either a complete fluid exchange or as a top-off, has no adverse consequences to the transmission performance or life.