Arcane Trickster - only 1 of 3 first level spells able to be added.

I have tried looking through previous posts, but from what I can see no one has pointed this out.  At level 3 as a rogue, when you chose Arcane trickster, you are supposed to learn 3 cantrips and 3 first level spells (two if which have to come from Enchantment of Illusion spells. Using the Charactermancer to level up to 3rd, it only allows you to select 1 first level spell. I tried to drag and drop additional spells over from the 2 schools Disguise self, Charm person, Sleep and Colorspray, (some the spells I tried) but none were added as they should have.  Am I missing something or is this a bug?

Tried a second character and was able to get all 3 spells of first level. Not sure what happened with the other character. Tried the character I could not drop spells to and was able to now - shutting down and restarting seemed to fix issue.  Regarding the spell selection, it did show all the schools for me as well.   Thank you!