Acording to Square All FF games are in order of neumericary (Although FFX and FFX-2 might be slotted somwhere before FFVII - I don't know because Square said this statment BEFORE FFX came out) and are connected but most are Mileniums apart. but I think FFVII and FFIII are a BIT closer to each other. (But Only slightly) I'll double check with Sqaure soon.

Also Zande and Enuo are 2 seperate aentirties. Again something that square have adressed beofore.