Root bumps?

Cloning in water is one of the slowest ways to get a cut to root and it usually only makes roots at the surface of the water where it can access air. It is much better to have them in moist plugs. That way they stay damp, but have pockets of air to breathe. I have even gotten cuts to root by wrapping them with toilet paper when I didn't have any plugs or rockwool to put them in. If you want to clone in water, you need to change the water regularly or you need to have an air stone, but plugs are much less hassle and normally take around a week.

Yes and yes.

You have to much foliage, cut the fan leaves and the inner nodes. If you not using a dome for humidity use one it help a lot, that and rooting gel. Awesome cuttings by the way.

yes.

Hi Lerome, Couple things might help, I see.you cut the stem at an angle that's good, but make sure that the cut is done with a razor sharp sterilized blade, if you use clunky scissors like most of anything thay will "crush" the channels as it cuts and this is no good. Make it as close to 45 degree as you can. Helps keep xylem and phloem open and fully operational. The tiny channels within the stem are very delicate. If they are crushed closed in anyway it can prevent water uptake. Also make sure to take cuttings first thing in morning as most of the energy/sugars stored in the stem will be used up. Once the stem hits the water it's important that the plant does not notice any nutrients in water or it will try to keep growing and not re root. Tap water in most places comes with calcium, magnesium among other mineral salts. You must leave it no other option bit grow new roots to seek out new places. Right now for whatever reason they are hanging on with what's stored in stem. Possibly in detecting nutrituon in water.