RANKX - Resultes repeated when in a table with other columns

Hi,

I have a SSAS tabular model of CRM online data and I am trying to use the RANKX function to rank open opportunities for the current quarter by Estimated Base Value and have the function interact with the slicers for Business Line and Region.

My two measures are

Pipeline:=calculate(SUM([Estimated Base]),Opportunity[EstimatedBaseValue] <> blank(),'Estimated Close Date'[Current Quarter]="Yes",Opportunity[Status]="Open")

Rank:=RANKX(ALLSELECTED(Opportunity),[Pipeline])

I am displaying the results in a table in Power BI and everything works fine if I only have the Rank & Estimated Base Value as columns in my table. The problem starts when I add columns to the table.

I want to have the Opportunity Name in the table, but when I add it I get replication of results all ranked equal last. The results repeat by Opportunity Name and then by Estimated Base Value like below

Rank     Opp Name   Estimated Base Value

1           A                   £100

2           B                   £50

3           C                   £10

4           A                   £10

4           B                   £10

4           A                   £50

4           C                   £50

4           B                   £100

4           C                   £100

If I take Opp name out of the table it behaves how I would expect

Rank    Estimated Base Value

1           £100

2           £50

3           £10

Any help would be greatly received

Thanks