I didn't know about the "teleporting" characters, as I never save during battles.
Well, I do mostly before battles, e.g. sometimes I put my characters in a good tactical position, set a trap, prepare for the fight, save, and then lure and attack the opponents. I don't need to reload often, but it can happen that my wonderful plan is foiled only due to bad AI behavior and pathfinding and I won't have that! ;) Only when I reloaded in these cases, the careful tactical positioning was lost.
And that instance where I found out about the opponent's position was the arena fight. It was preceded by a long stretch of dialogues and cutscenes and I didn't want to have to go through them again, in case I lost the fight, so as soon as I got control of my character again, I quicksaved.
Just for curiosity, which race and class did you choose?
Nothing spectacular, (neutral good) female human cleric. (And my old character was the same, only aasimar instead of human.)
Part of my character choices are cosmetic (and I hate to say it, but the best looking characters are almost always human female in these games, so there's hardly a choice), part are for roleplaying reasons (some characters seem a bit more out of place in the environment the game puts them in), and part of it is not wanting to deal with disadvantages (weaker stats, slower level progression), even if means getting advantages in exchange.
The cleric choice is mostly due to the game mechanics. I'm not that fond of their religious background, but it can be easily ignored most of the time, and as a character class I find they are the most versatile and also easy to play because they're overpowered allrounders. They can wear heavy armor and fight, they can buff, they can heal, they can turn undead, they can summon allies to fight for them and they can even cast offensive AOE spells, and that's the most fun to me. In the end my party mostly consisted of two clerics, the druid and the sorceror, and they would summon devils and elementals as melee fighters and distractions and then blast the opponents with AOE spells while healing and resurrecting each other if something went wrong. Worked pretty well. :D (I even taught Qara the Knock spell, so that I wouldn't always need a rogue in the party, but when I did that, the game was almost over already ... I wish I'd thought of that before.)