The Bag I got ( for a friend) were on the smaller side. The weight like you said had a large window of size and i found few I thought were anywhere near 70+.
But thats still a bit large. Its better to be on the small side and safe than order to big..
As far as the Red, my BEL has this also.. Ive seen it in most. Most likely its the fact we can see the vessels/capillaries I would guess.
The red dot looks like a tiny scale snag. They can get red/inflamed a bit. Nothing to concern yourself with unless it is open and then you would treat it.
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