1. to get lost ("sich+Acc versteigen" - getting lost while climbing or climbing a wrong path. Technically, it can mean that, but it's not very common. )
2. to get to, to get lost ("sich+Acc versteigen (zu)" - A figurative meaning used in contexts where you get to a weird place while talking. Like, for example when you talk and you end up making an outlandish claim or promise. Pretty rare overall.)