If you are finding the time estimates too small, you can increase your handling time,
I've been schooled by @pjcdn that increasing handling time doesn't actually help because once an item is Accepted the clock starts ticking.
Of course, that would only apply to tracked items.
Those of us who "go commando" on tracking have a different set of problems.
The generic shipping choices should work.
But then most Calculated Shipping is tracked and I think we end up back where we began.
At this point, 10 days from Christmas, anyone shopping for gifts online is afflicted with a terminal case of optimism.
When I went to the post office yesterday, the worker was hauling carts of parcels out for the 3pm pickup from about 2:20 when I arrived, and was filling what was certainly the second truck, possibly the third, when I left at ~2:55. In addition the post box was full to the point of being unable to close.
