Sleep timer init value

[tuxflo]

I'm used to listen to audiobooks with the booksonic app when I go to bed. For this I always set the sleep timer to 40 minutes. However sometimes the value shown in the sleep timer slider is to the value that is actually activated.
Steps to reproduce:

1. open book, set the sleep timer to 40 mins (using the slider)
2. wait until the time limit ends
3. close booksonic (my phone automaticalley shuts down every night)
4. Open booksonic and play a book
5. Open the sleep timer by touching the clock icon
   ->the previous value "00:40 minutes" is selected
6. Hit ok

Current behaviour:
after that procedure the sleep timer is set to 1:15

Expected behavior:
the timer is set to 00:40 minutes

Also I think the range of the slider should be canged as well, currrently it is hard to set a value like 40 minutes because the max range of the slider is 60 hours or so.

Edit:
When reproducing this issue I also noticed that the countdown timer doesn't get updated when the player is paused. The "correct" behavior should be
a) stop the timer when pausing the track too or
b) update the countdown timer so that the user is able to see the correct remaining time even if the track is paused.
In my opinion vartiant a) is better and other audiobook apps like "SmartAudiobookPlayer" handle this like that too.