I did a test and managed to get the two thin lanes you were speaking about.
I found that pulling down the track 'header' on the left hand side (where the arm, solo, fx buttons are) made the lanes bigger so that you can place the volume points (automation).
If you pull down to around the size of two tracks you should have enough room to place volume points on both the takes.
Windows 7 x64, AMD A10-7700K
MX7, MX8, Waves Mercury Bundle, Melodyne Assistant
M-Audio MTrack Eight
M-AUDIO BX5 D2
Adam Audio T5V