I have in my index.html a pagetitle tag and title tag, is one not enough?

my theme make in the index.html two title tags, is it not one to much?
I have a pagetitle and title TAG.

What theme do you use (I already asked that in the old forum)?

@dan German language category, pleaseā€¦

@apfelpuree - We have no plans to add other languages into this forum right now, sorry.

hey, the theme name is float.