PEARLTLS

I just got my 02 tls back, got a new tranny. drove around last night, then i noticed that at idle, like at a light, the car rolls back like as if its in the neutral position but its on drive. i know cars tend to roll back a few feet on a hill, but this happened on flat surfaces. i tried it out on my driveway when i got home, i let the brake off and it rolled all the way down my driveway. Has that happened to anyone w/ a new tranny? Also the gear shifter is
not lined up properly.