Yes, Beth games are notoriously buggy, hell, most games are buggy out the gate. The good news is Beth know this and spend months fixing it, with patches. In a game of this size there are bound to be bugs.
Why do people keep saying this? "Don't worry, Bethesda will fix the bugs..."
No, they won't.
Maybe I lived in another dimension when Oblivion came out. Bethesda didn't fix the bugs, the community-made unofficial patch fixed the bugs.