There seems to be a couple of different issues here. I'll address them separately. The first one is around the field name and
the second has to do with the decimal number entry.
If your field name for the table is entered in as "markup(down)",
you will receive an error message when attempting to save information in your
screen. The issue lies with the brackets
in your field name. Basically Method
shouldn't allow you to have a field name that contains brackets. I've emailed the development team to put a
restriction on this.
To fix this, you will need to delete that field from the
table. Add a new field called "Markup". In the design section, you can change the
label to appear as "Markup (Markdown)".
I've tried this on my end and I can see what you mean about
the decimal needing a number before the decimal place. Let me look into this a little further and
get back to you.