gmail messages not saved in mac gmail boxes

Hi All,

Created 2 gmail - mailbox files in my MacBook left side menu (I also have an 'on my mac' set of mailboxes - for filing/saving messages by subject-when I only used a one email address-also gmail).

In the gmail mailboxes, I created two separate gmail specific headings (corresponding to each gmail address)-with folders specific to the gmail address content (of each gmail address).

Problem: it appears that when I file those gmail messages, they don't remain saved in the folders I created (for each email). So I'm losing them.

Have read that mac mail isn't 'friendly' to users gmail folders...but wondering if my settings in the mac mail app are off. I checked the settings, but there's no relevant setting for this problem.

Yes, I could just check the gmail app, but then I need to create separate folders etc for my two email addresses (very time-consuming for filing/retrieving).

Any suggestions?

Thank you!