I did the same thing when i first tried to use a lift.
You have serveral sections of a lift, lift base platform, lift base, tube, lift top, lift top platform, when you make a lift depending on if you want to go up or down from the room your lift starts, you use lift base or lift top platform, then tube it up or down to the final lift top or lift bottom you cant use two sections with platforms or this hit your head will happen. You probally have it lift bottom platform, lift tube, lift top platform making two platforms in the tube.