First of all, this is a fine pair of shoes. Congratulations. Really beautiful colour, too. Regarding the polishing there are a few misconceptions out here in the forum which I now will address with your shoe as an example.
First: There is no such thing as overpolishing. Wax does not penetrate the leather, it is a layer or, in your case, several layers built up to protect the underlying material from water and dirt. What you did with the pommadier sounds about right. But this is where some people overdo it. You can actually overdo it with the cream since it will penetrate the actual skin, moisture and colour it, if you work with a coloured cream (or Pommadier). Usually one or two rounds is enough, if the shoes are not age old and dried out. But you should never apply much cream at all. So you writing, that you brushed off excess cream sound like you put on too much in the first round. But no worries, since you were able to polish the shoe right after that with wax - and it looks like a decent polish from the pics - you did no harm. Just keep your creaming to the bare minimum, which means, that you dip your fingers with the cloth wrapped around two fingers very tight into the jar and get rid off excessive cream by stroking over the top of the jar (sorry for my bad explanation, english is not my mother tongue). Then you apply with a medium circular motion. The more you press, the deeper the cream will penetrate and protect the leather. But do not overdo the pressing. Then you can go over with a brush. This will even out the cream on the surface and undo any excessive cream.
Next is to let dry the cream for at least one hour, better even over night. Brush once angain, as dust will have settled on your shoe.
Then comes the harder part. But before I go into this let me do some myths busting here:
1. Leather does NOT crack from polishing. Leather does crack from a combination of excessive wear and neglect. Water, snow, dirt, salt: all this will lead to a dried out and cracked leather over time, if the shoe is not being taken care of on a regular basis (best after wearing or before wearing them).
2. Crack lines in polished shoes come from cracks in the wax layer of your shoes. This is why we (apart from one occation: shoes for black tie events) never do a high gloss water polish for the whole shoe, but only for the tip area and never beyond the first natural compression line (where the toes flex the shoe). This is for aesthetical reasons only. It simply does not look good, when the wax layers crack.
3. Some members in this forum continue to state that a deep water polish look can be achieved with a few layers, like two or three or so and that more layers would not be good. Let me be clear here: This is not the case. The more layers you build up (remember: Only on the tip), the deeper the shine will be. Sometimes you'll see pictures of water polishes and you think, it looks as if I could actually look inside of the leather, like three-dimensional. To achieve this, you need to apply as much as 30 - 50 layers. Work with coloured and uncoloured wax rotationally, and you will be amazed how deep the lustre gets. The good thing is, that you can even restore such a multi-layered polish, should you happen to destroy the polish through contact with a tablefoot or something.
The process of a good water polish is simple and tricky at the same time. Some leathers (especially french box calf) have such an even structure, that you will get a pleasing result easily. Some leathers, especially pebble grain or Scotch grain need ample time and layers to smooth out the pebbles, but it is very worthwile since you will, done right, see the pebble structure through the layers of wax, if done with about 80 per cent of uncoloured wax. The surface of the shoe tip will be shiny and even. Repeat the circular motion over and over again, continuously reducing the amount of wax and increasing the amount of water (btw, spit is far superior to water, since it helps better to distribute the wax, try for yourself).
Sould you need more tips, please feel free to ask.
Always on the shiny side of shoes!