HTML not working in GridMarket Manual Payment User Instructions

I have MarketPress plugin with GridMarket/FrameMarket theme. Using the Manual Payment option and have entered HTML formating in the User Instructions section under Manual Payment Settings, under Payment tab in Store Settings. When viewing the page live the formating has been dropped.

Tried using Firebug to find out if it is a style issue but no joy.

Any suggestions on where to look?