Your plant is very dehydrated - either not enough water or it was kept too wet and the roots rotted off. Considering how course the potting mix is I would guess it has been too dry for a long time. Phalaenopsis like pretty even moisture. Water heavily and let it drain, then water again as soon as the top of the potting mix is dry.
The dark spot could be sunburn, so maybe it is getting a little too much direct sunlight too, which can contribute to being too dry.
The small plant forming on the old spike is called a keiki. This is fairly common with Phalaenopsis. Let it grow a couple more roots and then you can detach it and pot it up on its own - free new plant!
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