Well first off as you will find looking over the site here it's generally a good idea not to pick locks that are actually in use. Just in case somethings strange happens and you have you, as you did, replace the lock.
As far as the locks go, with tumbler locks picking will not typically damage a lock. However there are ways its possible, depending on what you are using for a pick or tension tool. Is it possible that a piece of your pick broke off and got stuck in the door lock? Another thing to ask is, can you put in the key and not turn it, or can you not even insert the key in the keyway? If its the second there are one of 3 things that spring to mind.
(1) Could it be stuck in the picked position? Try 'picking' the bottom of the keyway while turning Counterclockwise to see if you can get it to rotate back around, alternately when picking the tumblers can you get them to move to far up? If not, that's likely the issue.
(2) Is again could a piece of the pick be snapped off inside?
(3) Finally could you have damaged the keyway with the amount of pressure used applying to the torsion bar? a lot of new pickers think they need to much force and can at times (especially if they have a super sturdy homemade torsion bar) bend a part of the keyway.
As for the padlock I have a few questions. When you say open, does the padlock shackle open when you turn the key left slightly? or just you can feel the keyway rotate? And again can you open it with the key? (turning right or left)
Sometimes a lock will be easier to pick in one direction than another, this is especially true with an older lock ith a worn sheer line or a lock that's had a lot of pressure used to try and pick it. Could this be the case here?"
Ahyways, welcome (inasmuch as a new member myself can welcome) to the forums and I hope I helped somewhat.