"Lypoma removal with an extreme haircut and confusion over stay length"

I was booked in for an overnight stay recently for the removal of a large lypoma on the left side of my neck. I am 3+ months post left temporal meningioma tumour. I have several queries regarding my experience.

I do not know why I was booked for an overnight stay but I assume it was to ensure there were no complications in light of my recent medical history. I believe I went in for surgery at approximately 4pm and was back on the dpu ward approximately 6pm or earlier. I was discharged approximately 7.30 pm that night. I believe there has been a breakdown in communication regarding the length of my stay and would like a clear explanation of why I was told I will definitely be staying the night in the lead up to surgery and then told to go home less than 2 hours post op.

Also, I was notified in the 'holding bay' shortly before surgery they may need to shave a small amount of hair just above the incision. I agreed to the removal of a small amount of hair if it were needed. They shaved a quarter of my head and went nowhere near my hair line. To put this in perspective,I had a brain tumour removed recently and they only took a small amount of hair which was approximately 3 inches by 1 inch at the most. The amount of hair taken was, in my opinion, excessive and completely unnecessary. I felt there was absolutely no care taken to preserve any hair line. I can provide photos on request but I would like an explanation on why so much hair was taken for a surgery that was below/barely near the natural hair line. 

The staff were nice. The murdoch uni worker, Ade (something) was very attentive and friendly.