Ok, I've found a bit of an issue in testing conditions. When I get any of the High Sciences they don't appear in my spellbook or in my casting list. The ones I have tested are Seismic Vibration, Energy Storm, Bestial Metamorphosis, Ultrablast and Atomic Disruption but I assume the other High Sciences will act similarly. I have tested this in both SoA and ToB with new characters, for the SoA character I used console commands to grant enough xp to reach Cleric level 13 (this was on a Psionicist so my Thief level was much higher) and in ToB I had enough starting powers to grab a multitude of High Sciences from the get-go. The only mods I have installed are EEex, AionZ's Warlock Kit, this and Bubb's Spell Menu Extended, all on the latest version and in that exact order of installation.