Surface Pro 2 iCloud Mail won't scroll

I have tried to set up my iCloud mail in Windows 8 Mail application without proper success (for example, I can't see any sent items, but there are other glitches too) so I decided to use web browser access. However, whether in Chrome or IE or Firefox, when I log in to mail I can see the first few messages in any mailbox but I can't scroll down to see older ones: there is no scroll bar and no scrollability so I am limited to seeing just a few messages in each box unless I reverse display order, in which case I can see the last few.

THis is a 'biggie' for me: I have purchased the Surface Pro in order to have a travel machine with good photoshop and Lightroom ablities but also a tablet like form factor. I also like teh stylus for use in image editing. But I really do neeed reliable email while travelling and I am not going to stump up for an Office subscription for full mail facilities on a machine I will use for maybe four weeks a year.

Does anyone have any clues?

Thanks in advance!