I think I'm missing something, but I can't seem to get a simple chart of how many sales I've had per month at dreamstime?

Something like:

Jan: X Sales, X Downloads
Feb:

Etc.

I find DT's interface really clunky and difficult to navigate and never seem to get to the page I think I'm looking for!

Use the "Statistics" button in the Management Area. The second graph down will show DLs/Earnings for each month and a Revenue per Download figure.

Ed ...

Aha, thanks!

I guess RPD is the average royalty per download?