Take your time :3
Good question!
After some thinking, I remember that I clicked the button "Work till the end of the day" so late that I would earn 0 regardless, and that could have been the reason it was visibly looping through 0 costs and expenses.
I have used soda that day, but it was not from a vendor, to provide you full bug trace from user perspective:
0. Soda vendor had level 0, but two other vendors had level 1
1. I picked up soda from downstairs machine
2. I have shaken soda back in the ground floor
3. I have put it onto the dining room, janitor sitting place
4. It was exploding indefinietly and not dissapearing through the day without Infamy triggers
5. I placed another soda on some other desk
6. I had the bug with the button
7. Now I have invisible, infinite sodas on those tables :3
Thats the best I could do o7 Thank you kindly for being an amazing game designer.
PS
Do you also mean that improving vendor level raises how a trap deals damage? So for example Hardware Store level 2 makes nails hit stronger?