Five new orchids and questions about their health.

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Hello again,
I went to buy an orchid from a lady and well... She gave me four others as a present so I am very happy .
They look healthy except two which have black spots on their leaves. I've read these orchids are famous for this. She said she bought them with the spots and she thinks it's from water or over-fertilizing. I also watched a video on YouTube where the lady explained that fungi may grow where there are water droplets.
The most spotted orchid (Adaglossum Summit "Frenchtown") has yellow tips on some of the leaves which she says may be from over-fertilizing.
The Oncidium Hansueli Isler is the other plant with spots but they aren't so much and are only on the older growth.
The Oncidium cariniferum Dark Red x Odontoglossum bictoniense looks great - with no spots at all and with two new growths.
I don't know the name of the fourth plant but it also looks ok and it's blooming.
And the last is a Phalaenopsis which also looks ok but has slightly curved leaves. What do you think?
Although most of the orchids aren't blooming, I've seen pictures of them when they were and there was no color break.
P.S. They were in a bag and were touching each other. Thank you in advance!