The connection statistics cursor is providing double up value for all the connections statistics in test_stat01. Here is a snippet from the run: 

python ../test/suite/run.py test_stat01 -v 2 -s 0
  stat: 'block-manager: blocks pre-loaded', '0', 0
  stat: 'block-manager: blocks read', '4', 4
  stat: 'block-manager: blocks written', '36', 36
  stat: 'block-manager: bytes read', '16384', 16384

Here the block_read statistics was incremented only twice during the test but the cursor returns that as 4 instead of 2. The statistics cursor should provide the correct value for a statistic.