append rows in magic etl not working

Hello All,

I am attempting to append two data sources through magic ETL. They have the same columns and data type.

table 1: A,B,C,D,E,F,G

Table 2: A,B,C,D,E

When i try to append the two tables by including shared columns, the resulting table looks like this

Table 3: A,B,C

The table includes the combined A,B,C columns from table 1 and 2. But i'm not sure why colums D and E aren't showing up in table 3. Like i stated before the column titles and datatypes (text) are the same in both tables 1 and 2.