The artwork on the store may have been an earlier (non-final) version, or there's just simply multiple variations, which is usually the case for the t-shirt art.
Job Snijders works closely with the artists each release, and runs the store.
Edit: oops, bad eyesight led my brain to believe "no way this is legible text" when in fact it is. Needed a screen magnifier to read it clearly. Though the other items have police in place of security.
My bad. I have poor eye sight and on my first look the fonts appeared jumbled. On second look with a screen magnifier I can see it reads security while the others read police.
Job Snijders works closely with the artists each release, and runs the store.