I have the same problem.
I'm on the UK version and trying to set up Limit orders on the LSE.
I only see 'Deal' and 'Alert' options on my platform too (both on app and desktop), same as R-Walker. I have a dealing account and an ISA but no spread betting account.. Would also like to set up expiries of longer than a day, it's painful having to set them up daily when the market opens.. Thx