Magister caster lvl don't work on Force Missile (or more)

[DDOGoz]

"A powerful missile of magical force darts from your fingertips and unerringly strikes its target, inflicting 2d3+8 points of force damage. You fire one additional missile for every four caster levels."

I have a Wiz 19/1 Rogue. Before U14, his Force Missile has 4 missiles. After U14, I have an effective caster lvl of 23 through Magister (I know cuz when I cast GH or Jump they last 23 mins), but still only 4 missiles. What gives?

Which begs the question what other spells are not working with Magister caster lvl increases.

[budalic]

"A powerful missile of magical force darts from your fingertips and unerringly strikes its target, inflicting 2d3+8 points of force damage. You fire one additional missile for every four caster levels."

I have a Wiz 19/1 Rogue. Before U14, his Force Missile has 4 missiles. After U14, I have an effective caster lvl of 23 through Magister (I know cuz when I cast GH or Jump they last 23 mins), but still only 4 missiles. What gives?

Which begs the question what other spells are not working with Magister caster lvl increases.

There are a lot of spells that are capped at cl 20 even though they don't say it (including, at least i believe so, dots). Force Missile might be one of them.