Speaking phone not functioning topic

This is my second Nexus 6 in a week now. The first one I had serious back plate bulging and some kind of liquid coming out of it . Me and the T-Mobile sale Clark assumed it was battery fluids or some water had some how gotten into the phone it was the craziest thing I'd ever seen. I got a brand new replacement and everything seems to be OK except when I'm on speaker phone the top speaker is working but the bottom one is not. If I remember correctly on the first n6 both speakers worked when I had the phone on speaker mode. Can anyone confirm this or am I mistaken and only one speaker is on during a speaker phone call.

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