Yes, all the 'Eco' were 1.4T. You should be able to see a pretty obvious turbocharger hanging off the exhaust manifold. (Unless the exhaust is toward the passenger side...?) All LT1, LT2, Premier, Eco were 1.4T. Only the LS was 1.8 n.a.
Why is a bigger hose clamped to a smaller one? Engineering goof or loose end, I'd guess. Maybe they didn't talk until the parts were already designed. Maybe testing found there wasn't enough flow, so they spec'd a larger hose in part of the circuit. Maybe they already had each piece in the 'parts bin', so rather than redesign something, they just made it fit.
Why is a bigger hose clamped to a smaller one? Engineering goof or loose end, I'd guess. Maybe they didn't talk until the parts were already designed. Maybe testing found there wasn't enough flow, so they spec'd a larger hose in part of the circuit. Maybe they already had each piece in the 'parts bin', so rather than redesign something, they just made it fit.