Placenta

So I will be 32 weeks n a few days and I noticed since about 28w that I can see when my daughter is moving but dont always feel it? I went to gwr monitored at labor n delivery and she kicked the hb monitor and the nurse said did u feel that? N I said no?and she was suprised... supposingly I have a prosterior placenta so not sure how or why this happeneds? I'm going to ask at my Dr at my up coming appointment. But just wanted to see if anyone has had this happen to them?