Your download links point to the most recent version of the app, which is not always the recommended version available from F-Droid. Recommended versions are marked with a star. For example,
http://fossdroid.com/a/fdroid.html serves a download of 0.86 which is an unstable test version. All of this is handled better by the F-Droid client app. The way your site is set up now could lead to a poor user experience if they encounter problems with unstable versions of apps that shouldn't be downloaded by default.
Being open source, you're free to do whatever you like, but I suggest you talk with the F-Droid devs to make sure everything is mutually beneficial.