A vendor could have dispatched your order, however forgotten, or not had time to mark as sent, this would then still show as paid as your end.

Yes.

Order will time out and refund if it’s not marked as sent, but it is a manual process to switch from ordered to sent so can be overlooked.

Joking apart if you are suffering with that amount of paranoia you should probably cut down a bit!

But there are easy methods to reduce the risk. Use long term reputable sellers and particularly LB growers who take particular pride in every aspect of their craft. These people are not going to risk their reputations messing with product.

Pay for quality. If it looks too good to be true then it just might be. Paying a few bucks for a big bag of mixed strain shake may get you a bargain and it may not.

5 years on here and over 100 orders and I haven’t come within 100 miles of treated or contaminated weed….

dense rock solid buds usually means synthetic nutrients have been used in the grow mine is 100% organic grown from quality seeds cleanest smoke you will find

It's a tough one without proper test but there are few things that can help.
Look at the trichromes structure, take a magnificent glass and look closer and tell us what you see. Post a picture

hit up test borg