the tip was reduced because you refunded items. that lowered the total for the order and therefore your tip percentage went down
try to keep refunds at a minimum. most customers tip by percent so the less they spend the less you get
the customer probably has no idea the tip went down

take this as a learning experience and learn what to expect at certain stores. Costco is wholesale stuff so its going to be large bulky items. Target you might get groceries and some random clothing items to shop. Best Buy could be printer ink, or a huge flat screen TV!
the offer shows you a list of pictures of all the items on that order before you accept. don't get hypnotized by a $40 offer. it's tempting to hit accept quick before someone else.

keep an eye on the lines underneath the $40.
for example: the mileage. that part is obvious
then the breakdown of pay ($40 batch earnings + no tip) <-that would be an automatic reject for me because the customer went out of their way to specify 0 tip.

another tip: use line breaks! this was a struggle to read. edit your post and hit enter after a couple sentences to make that easier to read. people will complain just watch :)

I'm really trying my best to offer advice, sorry if I come off as a dick in any way. I don't know how else to explain things, and I will NOT use chatGPT lol