Shipping costs are shown on the product pages, but they used to show as soon as you carted something, which was great when you had many items you wanted to purchase (same seller) ... I liked it when I could readily see the combined costs upfront. But Etsy recently changed that and now shipping doesn't show until the very end of checkout (after adding address / payment), which is just wrong IMHO! The FS glitch is happening more often and could be why buyers are pausing their purchases. I hope Etsy takes note of this and changes it back to showing shipping right away!
ETA ...
Definitely a glitch happening with the free shipping. I just got an order where the buyer got FS and used an abandoned cart coupon ... in addition, I am to ship this item out early next week. Problem is ... I don't offer FS and my processing is pushed out til after we return from vacation. Not sure why this is happening! Luckily the buyer accepted the updated ship date, and I will honor the FS, but these glitches should not have happened in the first place!!
