It's surprisingly common to see news graphics where the numbers don't match the chart lines.
I think the first example is just incompetence - or possibly the omission of a white vertical line to indicate the zero point for the data.
The second one looks like a cut and paste error. If you add up the percentages they come to 118% for 2015. But if you change the UKIP captions to read 13% and 18% everything adds up and the lines are the right length.
Picture credits: The Times.