It sounds like either a shifter linkage problem, or a valve body inside the tranny. Id check and see if the shifter cable going to the transmission, or under the radio is loose.
95 Eclipse GS: 10.5:1, Crower 2's and MSII 186 WHP - 150 WTQ 14.697 @ 93.85 MPH......Gone, but not forgotten 99 420A Avenger: Given to my sister 99 GS OZ: Sold 03 Evo 8: Family Car with balls