Hi, I could use some advice on the best way to move forward with this issues. Here are the details.

Birth Certificate and NC Real ID drivers license show my middle name.

Passport and ALL my frequent flyer accounts (+/- 1M miles over 8-9 programs) don't show my middle name.

I want to apply for TSA Precheck and possibly Global Entry but don't know what name to use. I could do it now with just my passport (no middle name) but...

My passport expires in two years, I am thinking I need to reapply vs renew to add my middle name then (or sooner?) but will I loose any of my miles or can I update the name / combine accounts?

If I do precheck now with no middle name and then reapply for a new passport with middle name in two years, I am guessing I would loose precheck and have to reapply but am worried they may then deny it. This seems like a real mess over a middle name, appreciate any thoughts or data points on personal experiences.