@Terrabrand and Co, the copies
would be defect free if not for the sheer speed and excursiveness used.
It's the difference between forwarding a photo via mail, and someone sending one with a photocopier and tossing out the originals. And Lee made a lot of dang copies, and he's nearly all there if one stops and thinks about it. A coupla cells here, a few neuron connections there, 99.99999% is nice until one reads the XKCD comic about said subject.
If Lee zero copy remained, no problem. it could be compared to the final copy and make sure it stayed defect free, but it isn't.
Also note that there's a time delay. He perceives it as instant, but effectively he's frozen, packed up, shipped, unpacked and unfrozen. Hence his watch moving out of sync.
And yes, there's the slight case of having six seconds to live and seeing your original right across the room, not dying. You don't have time for reflection, or any mental crisis. Lee's clones go down swinging /grenade flinging because he's fully prepared to do so before he even clones. He has to, as he only has six seconds to live all the time 24/7.
And that didn't help him mentally all that much. It takes a creative mind to realize that a slightly odd and defective teleport means you can do whatever you want for six seconds. Human brains do that all the time with suicide bombing, but there's a reason why the suicide bomber instructor jokes always begins with "Right, pay attention, cause' I'm only going to show you this once." Repeats ain't good for ya.
Thus you have Lung and Lee as thematic opposites. One who cannot stop, and one who cannot start.
Oh, and he hasn't been restored from some old copy via the Endbringers, his brain has had a bit of jiggering. See this quote from the interlude.
"The dead portions of her brain were, and I quote, "welded like a glass sculpture to a desk".
