It may be that it was not your doctor's intent that you have
monovision, but monovision was the result.
You were myopic (nearsighted, shortsighted) before surgery. Your prescription (from another post) is moderately myopic in one eye and slightly myopic in the other. This gives you monovision, but your eye that should be fully corrected is not quite fully corrected. This can contribute to poor distance vision, but will give you better near vision.
Your undercorrected eye is 2.50 diopters myopic, which is a bit much for monovision. Some people prefer this level of myopia, but it seems that most people go for less than 2.00 diopters myopia.
You also had significant astigmatism before surgery and I believe your doctor mentioned enhancement surgery would be a possibility. Enhancement surgery would likely be able to resolve your current myopia in both eyes, but don't be too anxious to become plano (no refractive error). That will mean your near vision will suffer the full effects of presbyopia. Your doctor may be able to fit you with contact lenses to give you no monovision and/or less monovision to try.