I just ran a test - new project Normal template (i.e. no tracks) from X3.
Record mode is comping
Place new takes in separate track
1) Add audio track (set inputs, etc, add TH2)
1a) Open take lanes
2) Arm track (not lane)
3) Record take 1 --> goes into T1
4) Record take 2 (take 1 does not play but the mute button is not lit - this was throwing me off) --> goes into T2 (T2 automatically created)
5) Record take 3 (takes 1 and 2 do not play) --> goes into T2 on top of previously recorded T2 (both play together when played back)
Note for this test the length of T1 > length of T2 > length of T3 (not sure if this matters or not.
Another test
1) Add audio track (set inputs, etc, add TH2)
1a) Open take lanes
2) Arm track (not lane)
3) Record take 1 --> goes into T1
4) Record take 2 (take 1 does not play but the mute button is not lit - this was throwing me off) --> goes into T2 (T2 automatically created)
5) Add T3 manually and record take 3 --> goes into T3 (takes 1 and 2 do not play)
6) Add T4 manually and record take 4 --> goes into T4 (takes 1,2 and 3 do not play)
It seems as if there is a problem getting to the third take lane automatically (and this is where I noticed the problem originally).
I will go back to my original project and try it again with the track I am working on to see if I can reproduce the behavior in test 2 because at least the tracks are not playing there. The auto take lane add for T3 and above looks like an issue.