/setblock and /testfor are not working properl

Put the summary of the bug you're having here

What should have happened was the block placed at a set coordinate indicated in the command block

What actually happened was the block was being placed 2 blocks further or closer than intended

Steps to Reproduce:
1. place command block and put /setblock 0 65 -4 minecraft:stone
2. place button and push.
3. realize the stone was placed else where.