Excel 3d Maps - Unable to add more than 1 Field to Location

[Rogojosh]

Hello wonderful people, me again sorry. Ok, so I entered this weird 3rd dimension whereby something I'd not used before just worked, flawlessly, even with me @ the controls. That was yesterday though. Sample of the plethora of error messages today:
'Data range not valid' - the explanation is 'square brackets in file name'. I don't have brackets in the file name
'Mapping Confidence 0%, unable to map location' - this fluctuates between 0 & 100%
I ideally wanted to insert postcode followed by location name in the location field. Sometimes it recognises 'Postcode' (drop down select 'postcode' but if I try to enter another field here, such as location name, the postcode vanishes along with the map marker. Postcodes are mapped in incorrect parts of the country also. There are unique values and correct.
I have tried starting with entering postcode then location in every other box to no avail. My locations are unique and correct but in 'Category' it returns 'Location Count Not Blank'.
I have tried using the 1st successful data set and adding in the new data but it is not having it in the slightest - not valid - have also tried deleting connections and starting over many, many times.
Sincerely appreciate some help with this thank you so much indeed.

 

[Rogojosh]

Sorry, please disregard, I think I've cracked it thanks. 'Data Card' was the game changer

 

[Rogojosh]

Sorry, please disregard, I think I've cracked it thanks. 'Data Card' was the game changer

Sorry, please disregard, I think I've cracked it thanks. 'Data Card' was the game changer'
It would however still be helpful to know:
Am I correct in understanding you can't add more than more than one 'Location' related field to 'Location' (like postcode and place name) that these must be added separately into another layer?
& any info on causes of 'data range not valid? Thanks