trouble with spells, create portal and teleport

[Barbara]

I am still forced to take the long way around, and back and forth through dungeons, because I can't seem to get those two spells working right. it was my understanding that first you choose a spot you want to teleport back to, and use create portal, then later, you use teleport and are sent back to that spot.so....what am i doing wrong or not doing? i now have 2 pc's with both spells. i had 1 pc try to cast create portal, and i cant cast it on any entrance or room, it only worked when aimed at another pc? then it said portal created, but a lot of good that does if the pc is in my group! i used the same pc to try to teleport, and of course it dont work. i am totally frazzled with this.why cant i pick a spot on the ground or a room or anything? can anyone please tell me how to do it the right way? i really appreciate it!