Check a Local Route

OK, so I did what a lot of people suggest, get CT to map a route that I know well.. 

50.85470, -1.39640

to 50.82711, -1.43230

A route I have Cycled 100's of times.

It did not do a Good Job, I followed the CT route up and down steep hills on a route that I know well can be cycled as flat as a pancake. It knocked my confidence in cycle.travel so many people are saying the opposite, so I struggle to see if they are working in a CT Echo Chamber of loving or this is such a rare anomaly. 

My Concern is, I am planning to Cycle next week LEJOG and if in a short 3 miles (above) it does such an appalling routing then amplify that over a 1000 miles and I'm going to be doing 1000's of hills I need not.

I know people may say, you can't take a small route and judge? but surely that's just it.. "You Can" If CT can't work the way to a local pub without taking me through estates of houses and up and down Steep climbs to a destination that, I know well, has barely a slope, something is wrong? 

Any more similar experiences? I want so much to like this project.