Row Groupings for Measure Not Showing As Expected

[DSQU]

I am trying to group the results of my measure into buckets with a dax SWITCH statement, but i can't seem to get it to work. 

I would expect it to put the Daniel account into bucket 1 and the Robert account into bucket 2

I've had to slowly build my measure to work so this is the layers, starting at the begining: 

I have data that looks like this: 

My first measure looks like this: 

PrincipalBalDailyFirst = 
CALCULATE ( MIN ( AccountsHistory[Balance Daily] ), FIRSTDATE ( AccountsHistory[Date] ) )

Second measure

PrincipalBalDailyLast = 
CALCULATE ( MIN ( AccountsHistory[Balance Daily] ), LASTDATE ( AccountsHistory[Date] ) )

Difference: 

PrincipalBalLastVsFirst = ([PrincipalBalDailyLast]) - [PrincipalBalDailyFirst]

This simply calcualtes for each account, depending on the date range slicer selection, the first balance, the last balance, and the change in balance.

I had to use this measure to get my totals in the pivot table to work, which finally seem to:

Balance Change = 
SUMX ( VALUES ( AccountsHistory[Account Num] ), [PrincipalBalLastVsFirst] )

Test measure: 

Test = SWITCH (
    TRUE (),
     SUMX ( VALUES ( AccountsHistory[Account Num] ), [PrincipalBalLastVsFirst] ) < 0, "1",
     SUMX ( VALUES ( AccountsHistory[Account Num] ), [PrincipalBalLastVsFirst] )>= 0 && SUMX ( VALUES ( AccountsHistory[Account Num] ), [PrincipalBalLastVsFirst] ) <= 260000, "2",
    "3"
)

Now I just want to bucket the results for the Balance Change measure for each account, into buckets. For example, if the change was more than 1 million, call it "greater than 1 milllion balance change" and it can drill down all the accounts in the matrix. 

Any help would be appreciated, thanks! 

Dave