zahar0z
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Yes, it was indeed important =)
It worked. But this option also has one drawback. Now, both Tier 3 units are in the recruitment window. But before, when upgrading, Tier 2 upgrade was always on the left, and Tier 3 upgrade was always on the right. Now, for some, Tier 2 upgrade/downgrade is on one side, and for others, it's on the other side. It's not very convenient, but I guess you can get used to it.
So, there are two options: the first preserves the convenient upgrade/downgrade, and the second displays both Tier 3 units in their respective slots in the recruitment window.
Yes, there is this nuance. But in my opinion, it's still better than the creature being absent from the recruitment menu.
If it's a matter of principle, you can do it using a dummy creature.
For Tier 2 creatures, record the Tier 2 upgrade first, then the Tier 3 upgrade.
For Tier 3 creatures, record a basic dummy creature, and you can write nothing in their upgrades. In the dummy creature, specify both Tier 3 upgrades.
Then everything will work. The creatures will be displayed in the recruitment window.
And in the retraining menu, they will be in the correct order.
The only downside is that it takes up an extra creature slot. But, as I mentioned above, you won't use all 999 anyway.
In my opinion, the order in retraining doesn't matter; the main thing is that they are displayed in the recruitment menu.