Something that caught me out recently...........
I was checking my wife's account. To make sure she had enough points for a requested upgrade.
She had zero points in the account!
Not sure if this is new, but if the account is not 'used' in 18 months, they delete all your points!
200,000 gone just like that............ bummer 
There are certain conditions that do and do not qualify as 'usage'.
Suggest you check........
Probably old News for most here. But we have not travelled in 2 1/2 years.