How can I write Summary of an invalid date of birth test scenario

I have the following data in a test form field

Date of Birth

Age must be between 18 and 50

I am taking input from a calendar which currently allows me to have date of birth not between 18 & 50 past the current date, Example: if current date is 06/18/2019 then I am able to select 06/18/2020 which is wrong (set in future) also i can select 06/18/2017(not within 18 years range from current date ) which is a bug and also 06/18/2050 (past 50 years from current date)

I am confused in future how to report this bug using a good technical language if i face it.

1.) Do I need to create 3 different defects eg: one for date of birth behind 50 years from current date, 2nd for within 10 years from current date , 3rd for future date from current date

2.) is it possible to just raise one defect for all these test cases?