I have a SharePoint list field which is numerical with 2 decimal places.

In my Nintex form I have a Single Line Text Field which is tied this SharePoint list.

The String format on the control is set to 0.00

The validation is Regex ^ 0-9]*.*0-9]{2}$

This regex seems to work just fine elsewhere (i.e. not in Nintex), but this regex does not match an entry of say 10.00, or 100.00.  My guess is Nintex is stripping off the .00 but why?