HTC 8125 / 8100 / MDA (USA) / K-JAM / P4300 (Wizard)

i have my gmail account setup but when i recieve an email, sometimes i cant view it and other times after i have viewed the email, it deletes it or just hides it. Does anyone know how to keep emails that you recieve until you want to delete them? and does anyone know what i am doing wrong that would make it so it shows that i have a new email message, but when i click "view" it just goes to the messaging section on the phone and when i click on gmail it has nothing there... i have to then go to the gmail site to review the message

thanks for the help

Drabert 👀