CSR is badly scripted and known to bloat your savegame, it uses DuplicateAllItems every time you access an inventory (http://cs.elderscrolls.com/constwiki/index.php/DuplicateAllItems)... so I would not be surprised if it also causes some weird teleporting behaviour
Is that true? Would you suggest to switch to another companion mod, like Companion Master, or the most recent Minionz? Thx for the answers.