

Bus timetable
Hello, I'm a little bit confused on how to read these timetables. The pictures are just an example.
So this is line 701 Famjin-Oravik-Ferjulega-Tvoroyri-Nes...Samdvik.
- line shows an x, okay that means all weekdays from Monday to Friday, but then there appears to be sign T) on time 07:15 and guide says that it means only by request. Does that mean that regular bus will actually start going at 07:30? Also there are no shown times when would the bus arrive/depart at Ferjulega, Tvoroyri... all till Sandvik(not shown in pictures). Does that mean that there are two busses on x , one that starts at 07:15 and another at 07:30? And does that mean that the bus only goes until Oravik and not further? Why are there no times shown for all other places except the first two?
Then there are third(6) and fourth(134) line
Here you can see that there are singles signs T) without time. What is that supposed to mean? Something like I can request the bus at any time that suits me?
And finally fifth(135) line that is marked green(only on school days on specific season). Can I as a traveler with travel card go on it or is it only for students? Why are all slots empty except for the one in 13:10? Does that mean that the bus departs only from that town at that time and that I can't catch it at Famjin?
This post is really long I'm sorry but it is also quite confusing and I just want to be sure that I'm reading it correctly.
Thank you!