Symptoms
The issue that is occurring happens when making changes to any generated Edit views. When adding a row to the very right of the Edit view, the View Canvas designer options located at the top of the view loses almost all functionality. After adding the row to the right, every other button after the ‘Merge Right’ option disappears.
Diagnoses
In reproducing this issue it was found that one row in particular stood out, this is the “Created by” section which is configured by default when a list/ library is appified. Although a row is added to the right of the other rows, this row doesn’t change and seems to be “merged” into the newly create row.
Resolution
There is a workaround for this issue, complete the following steps to fix the issue:
1. On the Edit view in question select the row that contains the "Created by" information fields.
2. One of the items that is available to edit the views rows is the "Merge Right" option found under the View Canvas options.
3. Selecting this will merge the row to the right, select any other row on the view, the rest of the missing controls in the View Canvas (Merge cell below, Clear cell, Clear row, etc.) after the "Merge right" option will become available and usable again.
This issue has been noted will be addressed in a future release of K2 Appit for SharePoint.