Repeating Tables like you had in InfoPath

I've got all my formulas entered the same exact way you do, but for some reason when I click the button to patch the row and add the next it clears the value out of the row I just entered. Any Ideas? 

Patch(EECollection, ThisItem, {EEID: TextInput4.Text}); Collect(EECollection, {EEID: ""})

Thanks for the tutorial. I'm trying to apply your teachings to a completely different process. Three questions:

(1) is there a way to combine the 2 sharepoint lists so that they show all information (ie. multiple rows for each expense report with their corresponding expense detail items)?

(2) the way I would like to apply this tutorial would require 1 entry per user (ie. one expense report) with multiple line items. The "edit" expense report would then show all the line items for that 1 user entry. In the cascading gallery with the line items, are users able to delete/add more line items? Or is there a way for a user to edit their original entry and have the functionality to edit/add/delete line items? 

(3) this is basic as i'm new to power apps...instead of creating multiple screens for the new expense report and edit expense report, could those "screens" appear below the buttons? 

Thank you. 

@Shanescows excellent demo.. really liked the way you explained tiny details about the tabs. . 

I would like to ask if there is a way to initialize the ExpenseCollection gallery with 10 rows instead of adding dynamically..