Accessing replicants in formAPI and in a TPL

System

Hey,

I am writing a presentation template, and came across what seems to be some inconsistency to me, and wanted to make sure that nothing is wrong with my code.
Consider a situation where you have a container called X with replicants defined for it (min = 1, max = 20).
When I access the first replicant of X in formAPI I do so by writing X[1].
When I access the first replicant of X in a TPL I do so by writing X[0].

It seems like the index for the first replicant changes between the TPL and formAPI.
Is this really the case?

Thanks,
Ido