The DnD 3.5 Vampire's Create Spawn ability states they "may have enslaved spawn totaling no more than twice its own Hit Dice". This mean a 5-HD vampire can command any number of spawns the sum of whose HD is no more than 10, not that he can command up to ten spawns of any number of HD, right?
Ah, I see it now. Regardless, the LA is +2 for the psionic version as per XPH, which is the most recent printing and thus superceeds previous printings. It also doesn't have racial manifesting anymore, just the psi-like abilities.