General :: Contacts In Phonebook Listed Under Wrong Alphabetic Index Letter?

Today I synced all my contacts from my gmail account to my Android phone which worked without problems. After the import was done, I looked through my contacts on my phone and noticed that the contacts are listed alphabetically, under an index letter:

Just an example:
Jane Doe
James Brown
Julie Smith

All those are listed under the index letter "J", which is fine, but then the first contact under each index letter is listed under the previous index letter. In the example above, Jane Doe (which is the first contact that falls under the index letter "J" was NOT listed under "J", but it was under "I", which is the letter that comes before "J" in the alphabet.

And this seems to be the case in the whole phone book.

I tried several things, such as deleting the entire phone book, re-syncing the contacts from gmail and so on, but it keeps on happening again.

it the way Android saves/lists the contacts in its phone book?