With Legacy of Bhaal, when you removed a companion from party, save, load the save, re-recruit the character, the level & HP isn't what they are when you left him/her.
eg.
Minsc in party - HP 117, Level 12, Experience: 1,396,790, Next Level: 1,500,000
remove him, save, load
re-recruit Minsc - HP 350, Level 24, Experience: 1,396,790, Next Level: 5,100,000 (other status improved as well)
save, load
Minsc in party - HP 174, Level 12, Experience: 1,396,790, Next Level: 1,500,000 (other status returned to normal)
Affect both EE1 EE2, not all companions are affected, Resaad in EE1, SoD seems OK, but most companions are affected, the bug may not kick in at first, but will, eventually.