Would someone explain the thriftshop coupon to me, please?

[fronobulax]

I have a script that finds displayable items that are not in my display case but are in the mall, buys them and puts them in the display case. It seems to be buying a thriftshop coupon every day. I cannot figure out why. Does it expire while in the DC in which that could be a KoL bug? Does possessing one automatically use it, regardless of location, at the next purchase? Is a script doing that and I have not tracked it down yet? I don't understand why it seems to be a "special case" for my scripts.

Thanks.

 

[xKiv]

My thrifshop coupon has survived in my DC for quite some time already.
Buying a 28 meat cool whip from The Armory and Leggery didn't use it up.

Can you verify that the coupon is actully in your DC after you run the script?
Then grep -i "thriftshop" $your_session_files
maybe something is pulling it out

 

[fronobulax]

Thank you. It is there now. I cannot explain why. I manually purchased and moved it and it seems to stay there. Operator error is strongly suspected although there may have been unexpected behavior from a script.