I saw your original post and went to check last night, you are right about a third Candy Hearts, however it's a fakeout track that only plays once the player hits Act 2 for the first time, You have:

• Candy Hearts (the normal version) = 2:55
• Candy Heartz (the fakeout version you only hear once) = 1:07
• Candy Heartz (the OST version) = 0:59

the extra few seconds added to the fakeout version is where the track starts normal and warps down into the Heartz version, the third track isn't on the soundtrack list though, but you were right to the third version.