drive shaft question

[joe3180]

im not too familiar with the drive shaft and i was trying to take it off the tranny by taking it apart from the mid section but the bolts were on too hard so i got the 3 bolts off from the first knuckle next to the tranny...first question is that a bad thing to have done or can any of the bolts come off as long as i marked it and put it back how it was? and second what would the torque specs for those bolts be when i do put them back? thank you for any help.

89 240sx