From: Use of alternate title in command box
The Alternate Title can be used in the Library find box, but not in the Command box:

In most cases the titles are so similar that it doesn't matter, but there are examples where it definitely matters, e g Targum Ecclesiastes/Targum Qohelet and several other targumim. People shouldn't have to memorize which name and which spelling Logos happens to use.
(And to complicate it further, the two titles seem to have been mixed up. When you open several CAL targums, the 'Alternate' title turns out to be the real title. I'll report that on the metadata page.)