i tried to claim a res and it says i have the maximum, so i thought maybe my old was still mine, i typed /home and it says residence couuld not be found on any server
Do /home. If it says it is on another server, go to that server. Use /res unclaim. Go back to the res you would like, do /claim [insert number].
Are you doing /v home on accident? If so then you're trying to tell the system you want to visit a res owned by the player "home". Make sure you do /home. Also, do you remember what server your old res was on?
What your problem is that when you were a Gold Supporter you claimed two reses. /home and /home 2. You (or derelict bot) have unclaimed /home and are left with /home 2. You need to do /home 2 and unclaim that res before you can claim another res.