When displaying one of your characters (the nice layout with stats, spells, etc.) there's a problem when a character has Charm Monster as a spell.

Normally, Charm Monster allows targeting one creature. However, when casting it with a spell slot higher than 4th-level, like many spells, you can choose one extra target per level increase in spell slot. So a 5th-level slot would allow targeting two creatures, a 6th-level slot allows three, up to a 9th-level slot allowing the targeting of six creatures.

Most of these sorts of spells display the increased number of targets on the character layout as a light blue text; if you look at your character's, say, 8th-level spells, when you have prepared/learned a spell like Blindness/Deafness, it'll display blue text showing that when you upcast it using an 8th-level spell slot, you can choose 6 more targets ("+6") than normal.

Charm Monster will also display blue text showing that an upcast will increase the number of targets. But beyond 5th-level, it always only displays: "+1". So even though at 8th-level you should be able to charm 4 more monsters than normal, and a "+4" should be displayed, only "+1" is displayed. This holds true for the 6th, 7th and 9th level spells as well.

I understand this is a very minor bug that most will likely not even notice. But still, it might also be a quick fix, so I thought I'd point it out.

Just for my own knowledge: this has apparently been fixed.