[נפתר] How do I send just 1 changed string to a page translated via Smartling (Translation Service)?

Background of the issue:
I am using our dev site קישור נסתר to work on a page /engage that was translated via Smartling. I've changed a string on this page and added 'extra test string' at the end of it. I also added a new section under our first block and named it 'Alternating Block extra test string'.

Symptoms:
When I go to string translation and try to add them, it seems like they appear. However, this red text shows up, and if I send said strings, it seems like these pages get messed up קישור נסתר.

Questions:
How can I send to Smartling just these strings that were changed or newly added?
Should I send the entire page again to Smartling?
What point exists for these WPML packages?