Is this a bug, an exploit, or intended?

[Quiett]

When casting the cleric spell 'Animate Dead' you can only get a max lvl undead of 7. I made a bunch of scrolls with a lvl 10 cleric, and they create lvl 10 undead. At lvl 11 it made a lvl 11 undead.

Is the level limit removed because of the xp and gold cost?

Not that I'd mind having a lvl 40 skeleton in my back pocket, but it just seems a bit powerful for a lvl 3 spell.

[Amoenotep]

i think it caps somewhere..but i'm not sure where off hand