http://i28.lulzimg.com/6ff277d6b6.jpg

I thought it was 85 Spells, 20 Shouts and 60 Words 0.o
Then I skimmed through the spells and noticed many spells are similar to each other, like this :

http://i28.lulzimg.com/6ec683a593.jpg
http://i28.lulzimg.com/ba714d4b47.jpg
http://i28.lulzimg.com/9912ca585d.jpg

Although, I have no idea what "Chain Lightning +25" etc, means. Even the spell looks different.

... and eight hotkey slots (two, on consoles)

I thought for certain they would at least give us 1 through = this time. Guess not.

Chain Lightning +35 might be the superpower versions the NPCs use?

Maybe those are spells used by NPCs or spells in their upgraded forms (perks).

The spells have to be the ones used by NPCs to scale appropriately to your level (which makes me wonder why the player's spells don't scale...).

And it's not 74 shouts, either. There might be 80 words to learn out in the world but not 80 different shouts.

It might be the versions used by NPCs again. Draugr shout a lot.

74 shouts? How can that be if there are 3 words in a shout? As far as I know, Alduin only uses 3 shouts that we can't, not 54.

Well, I guess those shouts are 1, 2 and 3 word versions of same shouts.

As for spells... now THATS really strange.
But you mean spells themselves or effects? I don't know how the game sees the difference between 1h and 2h versions of spells, for example. If it's calculated automatically, or if game uses completely "different" spell.

TES games have always used internal spell effects for certain enemy attacks. i'm pretty sure things like spider/chaurus spit attacks are considered spells. traps, too.

it's also likely that a lot of them simply trigger script effects for cutscenes.

No, those are developer entries and NPC only shouts and powers as well.