Hi, I have had some email exchange with a booking company in the last few days using Mail App.  When I look at my gmail inbox online, I cannot see any of them.  However, some other emails sent to me from e.g. Curry PC World is there and it is on the Mail App inbox as well.  Can I ask why?

PS:  I have created a subfolder for those bookings and moved the emails to there.... would that be the reason?  But that should not have affected the emails on the gmail account??

I am confused....