[3.0.0 Bug] Ppt Reservation Total Discount

Hi guys,
PHP 7.4.33 + Joomla 4.3.1 + Helix Ultimate 2.0.12 + Solidres 2.13.4 + latest plugins

Creating a reservation (from backend) the “Total Discount” field is shown with a “-0” pre-filled value:

1 - BUG - If I accidentally delete the “0” and leave the “-” the Total corrupt. I add an image here for you.
Solution
- the “-” should be shown, but not editable.
- and the Total Discount value should be red and not black

2 - BUG - Right now I can enter a positive value (deleting the “-”) and the Discount is added to the total, rather than deducted.
Solution
Being a "discount" The "-minus" should be an intrinsic concept. The entered value will always be considered as to be subtracted (negative).

3 - Total Discount
Please, Why did you call it “Total Discount” and not simply “Discount” ?

Hi guys,
PHP 7.4.33 + Joomla 4.3.4 + Solidres 3.0.0 + latest plugins

The bug is still there.
Please, Can you confirm and provide a patch here to fix it ?