Why is one eye small after my lower blepharoplasty? And why would it make my upper lid slant down so much? (photos)

Scars take up to a year to heal. They will go through an inflammatory phase which will eventually resolve.  You should discuss those bumps with your treating surgeon and follow his recommendation as to massage or other followup care.

It does not appear that your eyebrows are drooping, as they appear to be in a youthful position. Asymmetry is the norm, and you seem to just have mildly differently placed eyebrows. Botox may help even out the asymmetry.

Yes the surgery can be corrected.  You likely had some ptosis correction that did not fully address the ptotic upper lid.  It is very hard to give more specific recommendations with an exam.  For example, to determine the levator muscle function, etc.  The good news is that...