Thats right ... nothings changed ... Its always normal for CS to give some wrong answers. If you look closely, for each captcha type on the screenshot, you will see the success rate. 48%, 44%, 100%, 31%.. etc.
Thats why your positing tool should be set to retry the submission X (3-5) number of times... to 'brute force' the submission.
CS has the highest success rates of any desktop captcha solver on the market. It is tested daily against its competitors and is always both faster and more accurate.