Reinforcement battles - to CTD or not to CTD

[Avicenna]

1) Factions - (Yours/Theirs) I am KH in all battles. The other side is one time both Makedon, other time both Ptolemaics. One time is both rebels.
2) Circumstances - AI army attacks mine, which is besieging an AI city. All three times.
3) Leaders - In the Makedonian time, the attacking army was led by a captain, and the reinforcements by the Makedonian faction leader. In the Ptolemaic battle, both captain. Eleutheroi attackers were led by a captain, reinforcements by family member.
4) Outcome - Makedonians had 2 tiny units remaining. Ptolemaics utterly crushed. Eleutheroi destroyed as well.
5) Positioning - Makedonian battle was at the edge of the Mytilene island, but no port or buildings. Ptolemaic was inland with nothing but woods. Eleutheroi was similarly nothing, but I could see Kydonia from the battlefield.
6) Version - EB Version (v.72, v.73a, v.74) .74
7) Screen shots - sorry
8) Save game - sorry

NOTES: all three were victories in case you missed it.

Makedonian, even though it was most recent, I can't remember. I'm pretty sure it was clear.
Ptolemaic was heroic.
Eleutheroi was clear.

EDIT: almost forgot. No CTD on all three occasions.