Bitcoin and Merkle Tree - is in Bitcoin the Merkle Tree actually a List (which of course is a special form of a tree)?
The edit is completely correct. However, there are two known quirks you might be interested:


This quirk happens if the number of transaction is not 2^n. You can read more about it here. This was known by the creator of Bitcoin.
This attack (may) happen in the case where a transaction with length 64 bytes is an element of a Merkle tree. Details can be found here.