XPS 8930, DIMM slots

I just received a new Dell XPS 8930  When I ordered the device, I accidentally ordered  8GB of DDR4 SDRAM rather than my desired 16 GB of DDR4 SDRAM.  I purchased another stick of 8 GB compatible DDR4 SDRAM and opened the box to install the stick and found that at the time of the original assembly that the OEM 8 GB stick was apparently put in DIMM 2 rather than DIMM 1.  I therefore put the new 8GB stick in DIMM 4.  The BIOS then booted properly on to WIndows 10.  I did a Windows 10 memory check tool and found no errors.  I then ran CPU-Z and confirmed that DIMM 2 and DIMM 4 had 8GB each of DDR4 SDRAM for a total of 16GB.  Is this DIMM configuration for SDRAM a problem rather than the user manual recommendation of using DIMM 1 and DIMM 3 if using two sticks of SDRAM?  Thanks in advance for any thoughts.