User blog comment:AndDie/Can an alchemist perform two types of alchemy?/@comment-1467547-20130501072828/@comment-1618178-20130508012340

Yes, that's right. ^_^

Actually Roy himself did a completely different type of Alchemy even early in the series: he transmutated a pig to look like a human corpse to fake Maria Ross' death.

And Ed, for example, has done Human Transmutation and metal trasmutation as well as many others, so there's no such thing as a limitation as to what types of transmutation an Alchemist can make.