Nice but has problems

I liked this app most of all pomodoros for iOS but here are some problems:
1. Timer is late when app goes to background! It looses about a minute each 10 minutes. Cant tell when exactly it looses time.
2. Randomly when I lock the screen while in the app and then unlock it, the home screen appears instead of the app.
3. When I return to the app then, it sometimes stops the timer on opening. But not always!

Also some less critical things:
1. Alarm sounds are too quiet.
2. Difficult to adjust the timer precisely.
3. Landscape mode is useless, IMHO.

Hope the bugs in the first list will be fixed.
Thank you for a nice app anyway.

L0tR about Pomodoro Timer: Stay Focused, v1.0