I used to count time like this: 10-12, as 2 hours
Then, Sister Nosy saw my time slip and asked how I counted my time. I explained it to her just like from above. She told how I should be honest with the time counted and that "Jehovah sees and knows everything."
So then I started counting time when I knock on the door, place something with people or tried to. Travel time not included.
I started writing letters to make up for the time lost; but apparently that wasn't good enough. Since I'm doing the letter writing by myself it was not considered "real service" because it wasn't the same as D2D or street witnessing. Those two ways are the ones that I hate most, because I'm socially awkward, extremely shy, and have trouble talking to strangers. Plus I have no transportation to the Hall except walking 2 miles.
Later I couldn't count coffee and bathroom breaks.
Then "official field service time" ended once I leave the door of the home.
Eventually, I had to count time by the minutes with the stop watch feature on my phone. The only time I'm allowed to count is D2D and street witnessing with a partner. At the end of the month, all the minutes would be added up and divided by 60. (ex. 120 minutes/60 = 2 hours)
By using this method, my hours got cut from 10 to 3 hours per month...even if I go out to service on every weekend of that month! Of course I got hounded for the low hours even during field service.
Extra: Did you get hounded to turn your report in, did an elder call your home asking you for your time?
Sometimes they remind everyone to turn in their reports as part of the announcements. The elders did call my home several times for my time. All those times I could have sworn I put my time slip in the box. Maybe I forgot to put my name on it.