Actually I got a meyer lemon tree and have been wondering the same thing since the limbs are starting to get a little crazy. I planted this tree last year and it's just starting to show growth, but in a pretty crazy way. Seems like too many of the limbs are starting at the very bottom and there's one limb (best seen in the sixth pic) that is starting to fall from it's own weight, so it sticks out quite a bit (i.e. it's not growing in that direction, it's falling in that direciton).
Probably not the best pics, but I'll see if I can get some later on, but if you want have a look. https://s1128.photobucket.com/albums/m484/76gunner/Lemon%20Tree/