Thanks, Yes I do have another expression, but even when remove this expression i have the same problem, as you can see below.
The problem is that it is creating two lines for the one expression, the Actual figures.
Even when you highlight the ledgend for actual it highlights both of these lines.
just create a new chart add your dimension and one single expression
also if you add multiple dimnsion then it will come in your legend do .
have you added tow dimension Plan,Actual if this is the case then Gybert is correct
it will appear more than one line in chart? its up to you how many you want .
if you want one then remove that dimension.
I have one dimension - MonthYear
I have two expressions - Plan & Actual.
I can disable the Plan figure and I still have the same problem with the Actual. ( double lines)
What Iv done is recreate the graph from scratch and for some reason it is working now.
I still dont know why it did that,
But thank you for your help it was much appriciated.