No problem - I usually skip anything caster-related when I multiclass (especially multiclassing two spellcasters) as the charactermancer makes a mess of spell lists, spell slots etc, and just do it manually afterwards. HP, traits & class features are usually fine, though! My druid/barbarian mutli got... 9 cantrips, for some reason? 3 = 3... all good so far. 3 + 0 = 9? OK... go and have a lie down, charactermancer.