Why do my eyes look odd after upper blepharoplasty?

It is always useful to include photographs of your face/brows/eyelids prior to surgery so that one may compare the before-and-after results properly.
Your left upper eyelid is a tad higher (mostly laterally) than the right upper eyelid. This, of course, may have very well been there prior to surgery.
You probably had a conventional upper blepharoplasty with removal of skin, some muscle and fat. If so, you can get some "hollowing: of the upper eyelids. This is not always bad, contrary to popular perception. There are patients where this looks good and others where it does not. It all depends upon the changes that were present prior to surgery, what you (the patient) was seeking and what the aim of the surgeon was.
As when one signs up for any surgical procedure, and especially so when you have cosmetic surgery, trust your surgeon, see them with your before-and-after photographs and review the results. With different techniques used by different surgeons, it is best to allow your initial surgeon to guide you. Most surgeons will want to see you through.
Do not rush into a brow lift without a proper review of aims, results and outcomes with your initial surgeon!
The good news: I don't think you have had "too much skin removed" on either side. Although you have not included a photograph with your eyelids closed, I think the distance between your brow and eyelashes is good (adequate) for eyelid closure.