How to update Member Information in Membership Management

I have tried to update Member Information for our club (1294652), such as Joined Club Date, while logged in as Club admin by using: Edit Member, update "Joined Club on" date, then Save Member.  The date is there, as expected.  I use the "<Membership Management" button to go back to Membership Management and there is no "joined" date for that member.  I use "Edit" in that member's row to verify, and there is no longer a date in the "Joined Club on" field.  I have included a screen shot.

Please share a procedure that works.
 

Worked for me
I used the same record  as you.
set the club start date to 2026-01-01

What browser are you using what OS?
Did you do a hard reload after the update? (You can use the link at the bottom of your site.)

Brian, thanks for the quick feedback.  I am using Chrome Browser (version 153.0.8010.37) 64-bit on Windows 11 (version 25H2 OS build 26200.9445.  I see that you did successfully update the club join date for Carlos to  2026-01-01.   I tried again and got the same results as before.  I repeated the process again and clicked on "Click here to  reload website from server" wafter updating the date to 3/1/23 and selecting "Save Member" from the top of the screen.  The date remains updated after both "Save Member" and "Click here to  reload website from server".

I think it must be my next step that is wrong because it reverts to 2026-01-01 after I select  "<Membership Management" at the top of the screen, just above the red "Edit Member" in order to return to the Membership Management screen.. Please let me know the correct step (the next step you took) after editing the date and "save Member" to return to the Membership Management screen.
Thanks for your time.
 

I just changed it again.
Membership Management > Carlos Edit > 2023-03-01 <<<<< make sure you are entering a valid date

Check at the top for errors or the "Carlos was updated."
 

I have now updated the "joined club on" date for Cyril.  I am attaching a screen shot where you can see that the date format is correct.  When updating it highlighted Month / Date / Year, and appears correct.  The moment I hit "save member" it highlights my user name "admin - 1294652".  Perhaps the admin can't update club join dates?
I did not see any errors at the top or any message that "Cyril was updated".
Should I login as my user account instead of admin?
Would you please clarify:
Is there is anything else you are doing other "Save Member"
Is there anything wrong with exiting the screen by hitting the "<Membership Management" above "Edit Member" after "Save Member"
Please see attachment.

READ the ERROR in RED