Sorry, I didn't mean you personally - I meant that your situation was unfortunate - please excuse my British humour!
There has always been a problem with time on the performance exam, and you are right to mention the quality of the of the graphs in the exam - they are awful - and the margin is very close.
Your answer to the first one is correct - assuming the aircraft was an SEP with flaps up for take-off. You must enter the graph with the defactored distance of 1924 ft as you would if you were trying to find the field-length-limited TOW.
I will try to make some time to look further at these later.