I've just had a look at the notes on this page, and I think I've managed to remember what some of the illegible parts of the page meant.
A: Unfamiliar track
B: Reworking of Track 7 (Start of Spike's Birth)
C: Another Unfamiliar track (Spike Eating)
D: [Track 5 Part 2 played twice, then Part 4]
E, F & G: An instrumental version of If We Hold On Together; played and repeated three times before becoming climactic on the final one.
H: (Blank) (Glade destroyed by hungry longnecks)
I: [Silence]
J: [Track 5, prior to meeting Petrie] (Climbing the Tree)
K & L: Possibly added Brass
M & N: Variant
O: Short crash (an edit of the music played when they first meet Petrie and he falls from the tree).
P: [Track 2, music is from scene where Littlefoot and Cera are carried away by their parents] (I can get my OWN Green Food!)
Q: Repeat of something, possibly 5:25 onwards (Repeats, higher pitched)
R: (Blank)
S: Track 7? Or end of Track 6, "Without Mother" theme (Probably referring to the music played before the berry scene; the end of Littlefoot's conversation with Rooter)
T: Track 3, with Ducky's theme added (refers to the scene where Ducky moves over to Littlefoot. There's another tune played over the existing track when this happens)
U: Track 6/7 sped up. or altered Track 7/end of Track 6 (If We Hold On Together instrumental, with a short edit at the end)
V: Piano
W: Reprise of Track 2, when Sharptooth is at the bubbles, then a repeat of Cera's fleeing music.
X: Unfamiliar track
Y: Theme (Refers to instrumental version of If We Hold On Together, arguably the "Theme" of LBT)
Z: Track 2 Opening (Plays during "Though they were tired...")
1 & 2: Unfamiliar track; an edit of If We Hold On Together?
3: Familiar?
4: Edited Ducky Theme
5: From Track 6/7? St[art]?
6: Edited Mid Ducky/Petrie/Walk. (Plays late in the fight scene.
7: Edited theme, Track 7
8: Opening of track 2? Track 6?
From recollection, I believe that "Ducky Theme" refers to the light music occasionally played. Blank may also refer to silence, but it could just be that I hadn't identified the tune at that point.