I talked to support today about this issue and they too could not explain it. Fills forms being rounded and added together is a crucial part of my job and I'm finding that oftentimes the rounding is incorrect by .01, often because is was incorrectly added after the rounding process.

I know Adobe has the ability to round numbers in the fill forms to a specific number of Decimal places, but what I am sort of seeing is that it doesn't matter what rounding you use, Adobe adds the raw numbers (Which defeats the purpose of rounding).

I have attached a file that contains an example of the incorrect addition based on the rounded values. the 2 top fill forms in the red box add together in the last fill form in the red box. If you checked the addition manually you will see that the addition is off by .01. But, if you add together the raw values (Unrounded) that is technically the correct value rounded.

No one can explain to me why this is off by .01 when it very clearly should be adding the rounded values instead of the ungrounded raw values.

Version and system information at the bottom.

Here's a potential bug that I found:
1. Change a radio button name.
2. Save and close the PDF.
3. Reopen the PDF.
4. Observe that the radio button name is missing.

This is driving me crazy because I have validation set up to make sure all the form fields are filled in properly. I can't do that if the radio button name is missing.

Adobe Pro:
Architecture: x86_64
Build: 21.5.20058.441104
AGM: 4.30.107
CoolType: 5.14.5
JP2K: 1.2.3.48698

Computer:
Model Name: MacBook Pro
Model Identifier: MacBookPro15,1
Processor Name: 6-Core Intel Core i9
Processor Speed: 2.9 GHz
Number of Processors: 1
Total Number of Cores: 6
L2 Cache (per Core): 256 KB
L3 Cache: 12 MB
Hyper-Threading Technology: Enabled
Memory: 32 GB
System Firmware Version: 1554.140.20.0.0 (iBridge:18.16.14759.0.1,0)

Acrobat DC 21.005.20048 (Win10):
Actions taken:
- Starting a PDF Form from scratch
- Adding text with text-tool
- Adding text-field
- Adding checkbox
Result:
Text and any other object cannot be selected at the same time, neither by box-select nor by SHIFT or CTRL.
Text does not appear in "Fields" list and can thus also not be selected there.
- Cannot align text with fields or other objects
(Different text selected does not even promt the alignment-options)
- Cannot move text with fields

Proposal:
- Make text selectable together with fields
- Create a "label" object, which acts like a field, but can only be edited by the creator / in "Prepare Form" mode.

Currently you have to use Java Script to create a dropdown list that includes an item with a null (blank) export value. There is not way to add a null value to the list in the Prepare Forms - Dropdown Properties user interface. You can create a list item that looks blank by using the space bar, but that is not the same as null and will generate an error when importing the data into our database (where true null is an acceptable entry, but any text entries that don't match the validation list are not, and the entire record will be rejected). Those of us who don't create a lot of forms need a way to add a null value item through the user interface instead of having to learn to use Java.

I am currently stuck on a project here due to the sometimes unpredictable and difficult to work with form field auto detection in Acrobat. I am designing a rather complex form in InDesign and exporting the PDF to have the form fields auto-generated in Acrobat.
Radio Buttons in particular are the trickiest to work with because of their demanding conditions. It is leading to a frustrating end-user experience when the radio button form fields get generated as circular check boxes which is intuitive and confusing. It seems to unexpectedly incorrectly interpret them as check boxes in some cases, and correctly interpret them in other cases even though the conditions are similar.
The Radio Button detection should be improved for more consistent results.