Liposuction is complete when there is no fat coming out of the cannula.
Generally the surgeon suctioned in area till there is no more fat coming out. It's really not a judgment call as to when to stop liposuction. One should ask your own plastic surgeon this question.
Unhappy with liposuction result
Before/after photos are needed to have any opinion.
It may be that this was the amount that needed to be removed - and that you are swollen and your result will emerge in time. Best wishes.
Liposuction Results, Disappointment
My suggestion without seeing and before and after photos is to discuss this with your physician. There is nothing wrong with being conservative. Also 1L is a normal amount for someone not very large to begin. If its only 2 months from your surgery, you will need to wait 3-6 months for the final results. Otherwise, get a second opinion from someone more experienced who specalizies in this. We would gladly see your for a consultation. Best, Dr. Emer.
Without seeing preop and post-op photos it is tough to say, but remember not all fat can be removed, and you are still healing.