Thank you Rwilem. Yes, you're description of the proces is correct, I know that now. I was just green behind the ears/novice/unwise to Thai ways.
Seems i've also been a lucky sod, I visited today and got away with any fines, they never even mentioned them🤔.
Finally, I felt the two members of staff I contended with were both horrible to the core. Unhelpful, no humility and downright rude to many of the farangs. A few older guys not knowing the the processes were shouted down at in front of hundreds of waiting customers. A truly humiliating outcome for many. As an ex occupation trainer in admin and customer service I found it all quite unsettling.