Subform control rules and configurations do not to work when importing from an excel file

The subform control rules and configurations do not to work when importing from an excel file. Below are two scenarios:

1) I have a text field control (contained within a subform) set to a max character of 40.

If I manually type in the character, I cannot exceed the 40 characters (as expected).

When importing from an excel file, I am able to import more than 40 characters and submit the form, bypassing any validations to that control.

2) I have a control rule to trigger JS and set the text field value to uppercase. 

If I manually type in 'test' all lowercase, the rule automatically sets the value to uppercase and the uppercase persists on submit.

If I import from an excel file, the subform control rule updates the value to uppercase, but on submit the uppercase does not persist. Value is stored as 'test'.

Is this a known issue with subforms?