I've never been dinged extra shipping charges from
Kleen-Rite, although one time the shipping company showed up without calling first and no one was there to receive it, so they wanted $120 to re-deliver. I went to them and picked it up myself without extra charges. The fault was on
Kleen-Rite for not passing on instructions to schedule for delivery. My backorders always come free shipping, but sometimes they take weeks or months because they wait until they have everything.
My biggest issue with them is getting the orders wrong. Three times I've ordered Fragramatics product and gotten their brand stuff instead (and of course billed for the more expensive one). They're terrible at packing stuff - I ordered four 50' high pressure hoses, which they packed in one box along with 12 guns (loose) and a dozen boxes of Little Trees. UPS dumped it in my driveway upside-down because it weighed 82 pounds, so all the boxes were crushed and split, plus they ate a really expensive shipping bill (It quadruples when you ship a box that big and heavy). For their own good, I try to order enough so it has to go on a pallet, which is also a lot easier for me to receive since I have a commercial address to receive it.
FWIW they only have a few permanent and full-time employees at each place, the rest are hired from a temp agency. It supposedly saves them money.