There are several different versions of OoT. The original version (known as 1.0) is found on all gold cartridges. It has the most glitches to exploit (which is the best part about that game) and contains all the original uncensored elements like the Fire Temple music and blood. Some very early gray cartridges are also 1.0. Those were probably made for release at the same time as the gold cartridges. So if you have a very early gray cartridge, you possibly have 1.0, and that's why you have blood in yours. 1.1 and 1.2 are later editions of the gray cartridge that have various alterations made to them. I'm not quite sure what the difference between 1.1 and 1.2 are.