PCB 4.1 micro bottom side?

Hi, I order the PCB 4.1 micro and now I realized that the bottom side has more free spaces for resistors, capacitors, transistors… This parts must be order separately and put them on? Or isnt necessarily because are they on the top side? I measured that the bottom pin and top resistor pin ( top resistor smd are soldered) are connected and that they are confusing me. In BOM file I found that parts like as R32-R37 and they are not smd.

The components on the bottom side are all meant for through hole replacement components for component shortages or failures. You shouldn’t need any of them

Okey, thank you