level 4 wizard spells

1. shadow conjuration. it seems it should cast a "shadow variant" of invisibility, mage armor, magic missile or summon shadow. what does shadow variant mean? when i cast it it simply summons a... shadow.

2. polymorph self. supposed to turn me spider, troll, pixie, umber hulk and whatnot. when i cast it i can only turn into spider. how to get the other forms? or is it level dependent?

Sounds like you dragged those spells onto your quickbar and are casting them directly from there. If you do that, you get one option as a default. If you cast the spell using the radial menu, you can choose one of the other options.

ok thanks that was the case indeed.
any way to use any of the other options on quickbar?

oh never mind that.. just found out, use radial menu of quickbar instead of dragging.