Schoppegrung44
Which connection are you looking up exactly?
The Monte Brè Funiculary is NOT included in the Arcobaleno regional fare network. Therefore when looking up connections to the Monte Brè summit using the funiculary, only then you’re getting a point-2-point (or Lugano City) ticket offered instead of an Arcobaleno zone ticket. The funiculary itself is 17.00 full fare (8.50 half fare) one way, 26.00/13.00 return.
So the 5.20 you mentioned in your post is just for an Arcobaleno Zone 10 (single journey) ticket, valid only for the buses until the Funiculary base station in Suvigliana.
So either get an Arcobaleno zone 10 return ticket (= day pass) for 10.40, if you’ll hike Monte Brè. Or then get the p2p/city ticket offered for the complete trip including the funiculary for 36.40.