Sounds like you've lost the scion, and only the stock is growing. I ordered a small one through the mail awhile ago and it blighted off right after leafing out. While there are some examples that have been establishing in landscapes here (and I have seen the cultivar loaded with fruit while still in pots at a garden center) I have seen others with dieback problems. So you may have had bad luck and had yours get heavily infested and die or die back right after planting. Stone fruits in general are susceptible to multiple diseases and pests that may appear and spoil a planting. The general condition is for them to be fast-growing, short-lived trees that flower heavily from a young age and then die early. The normal habitat for the wild species is open, sunny recently disturbed or otherwise non-forested sites where they pop up early in the game and then die out as other trees come in and start to produce a different growing environment, with increased shade and decreased exposure.

You've probably discovered that it is just water stressed (wilted). It should come out of it on its own if you didn't damage the roots too badly. To ease the stress, enclose it in a clear plastic bag - maybe even a garbage bag - to keep the humidity high until it rebounds.

My moonflowers, which are related to morning glories, sent out new branches when the tops snapped off this spring. I've never pruned morning glories, but there's a chance they will do the same. I would carefully straighten the bent stems, and not cut them unless the vines began to wither where they were bent. Sometimes a plant can rebuild a bent stem, but it takes time and must be treated gently, like a broken bone. Either way I don't know if they will bloom, because I don't know how they behave in your climate. The vines will definitely need something to climb, otherwise they will sprawl on the ground and likely get stepped on by imbeciles. Can you put a trellis in that spot? A teepee made from three or four long sticks tied together at the top? Make sure to sink the poles deep into the ground, at least a foot down, so it can't blow over in a strong wind. I've had that happen. I've also had wind and rain rip vines off of poles. You may want to gently tie the vines to whatever poles/supports you use, to prevent this. I hope this helps; blue morning glories are worth saving for their beauty alone, and it sounds like these have a special place in your heart.

That happens to my corn quite often. I usually either drown them in neem (at night) or just wipe them off with my hands, crushing them as I go; usually the latter. They don't really do damage as long as I watch out for them. Be careful the ants aren't a biting ant of some kind. They'll crawl up on your arms if so and bite them all over, speaking from experience!!