Printing off base

Anet ET5 printer

My gcode plate build shows the model centered, start commands for printer do not include going to near left corner of plate, yet despite checking the start stop commands, the position of model in build plate and home position being in centre of plate my printer keeps starting the print in the near left corner of the plate and off plate.
Can someone advise please as this is my first 3d printer that I got for Xmas and I’m at a loss.