I'm adding new rows to my table but changing other rows involuntarily

[Darren_Murphy]

Yes, you should always use User Specific Columns with a Custom Form.
If you want to show existing data, you can use normal Text components (not input components).

Another way to approach this is to use what is commonly referred to as a Helper/Worker table. This is generally just a single row table that only contains User Specific columns. Read more about that below:

How would you describe a helper table?

In addition to @Darren_Murphy’s thorough description…in simplest terms, a helper table is a table that does not store data…at least not long term. It’s a table that does “work” (or performs a specific function). This is done with the use of user specific columns and/or computed columns. When put together, it allows the helper table to perform it’s intended function and give you whatever result you need. It’s just a matter of allowing the user to enter data, or using various computed columns …