mORMot Open Source

I started using the PDF engine and face one tiny problem.
I use the engine to make receipts and to have them look nice I use the Courier New font, which is monospaced.
I read in the .txt file and ouput the lines to a pdf.
Everything looks nice but in the top section you can see that the ':' are sometimes shifted a bit.
Do I do anything wrong?
Here's the top part of the file I am converting to pdf:

KOPIE KOPIE KOPIE KOPIE
KOPIE KOPIE KOPIE KOPIE

Filiaal    : 010-001
Verkoper   :
Bonnummer  : 000279
Datum      : 10-02-2021
Tijd       : 13:22:59

The text is in a notepad file with Font Courier New.