When importing the number from an excel file as mentioned above the result in the entity is 0.0028235600 when setting the decimal precision high enough to display the numbers behind the decimal separator. This is not correct as the number should read 0.002823563 This is caused by the way the data is read and converted. Setting the logging to trace level shows, that the number in cell A2 is read as:
Reading A2 / '2.8235629999999999E-3' / NUMBER
Then in coverting this to the decimal some of the precision is lost leading to loosing the last digit. This is caused within the java code of this module and I suggest filing a ticket for this issue as it is a platform supported module, or fix it and still file a ticket with the fix included….