Editing your current or selected schedule can be done within the Recurring Posts tab in the left hand menu.
Once you are in the recurring posts tab, hover over the date or day of the week you would like to add your recurring post - you should see an add button pop up - click the button to select what type of post you would like to add to your schedule and when:
First select the Publish To dropdown and select the platform you would like your post to publish to. You can select multiple here, if you would like the same post to go out on multiple platforms.
Select the content type you would like to add to your schedule form the Choose Category dropdown
Select the day of the week you would like the post to go out on. You can select multiple days here, but one can only select one time for all posts if you do select multiple.
Select the week you would like your post to go out, i.e. the 1st, 2nd, 3rd or 4th week of the month. Again you can select more than one week here if you would like the same post type to go out multiple times in a month.
Next select the time, you can either select from one of the suggested times, or manually enter a time in the fields under Post At.
Once you're happy, click Add Post to add to your schedule. You should then see this appear in your calendar.
Once you are in the recurring posts tab, click on the post you would like to edit within your calendar, this will bring up the options to edit your post, once edited, click the update button at the bottom of the page.
If you would like to delete, scroll to the bottom of the edit post page and you will see the option to delete.
If you would just like to delete or edit one post rather than the recurrent post, this can be done by clicking edit on that post within the queue.