Once I used the free ground shipping UPS option. I wasn't in a rush to get the package, However, one morning I checked tracking,and it arrived at the local UPS processing center a day early. Call to pick it up instead, and rep said, should be ready for pickup in the afternoon. Well, go there and the clerk says, "no, can't pick it up today. You'll have to wait for tomorrow."
I think, once the clerk realized I paid ground, they didn't want to release it early. I think most things to Alaska are shipped via air, so they didn't want to lose money. Seems kinda asinine to hold it though if it arrived sooner than expected.