Splitting a column by delimeter to maintain all data

I have a 'tags' column which holds multiple varchar tags split by a colon. There can be 20 odd tags in the single field. 

I split into columns by delimeter, using the colon, and Power Query returns two columns, thus ignoring 18 columns of potential data. 

I can manually edit the code to force additional columns, which then contain the expected data. 

When I split into rows, it maintains all relevant data but I want columns, not rows.
Why is it only automatically creating two columns, when there are multiple instances of the delimeter? And is there a way for me to ask it to perform properly?