[mistamca]

The reason you can’t guarantee short term deletions is because how do you stop the original party from reporting the item again, which is normal practice.

You are not wrong. This user is talking about inquiries on Experian. Experian actually doesn't host the record for inquiries. They use Sagestream for a lot of inquiries.
24 hour is extremely easy. You dial the Experian hotline (855-414-6048), say there are an error and list which inquiries are incorrect. Within 24 hours it will be gone and there will be a message on the credit report on the right-hand side.