Two issues with repeater-areas in CF8

Hi all, 

I am currently switching to CF8. The new repeater-area is quite straightforward, but there are currently two issues 

1) as far as I can see, radio-groups within repeater-areas do not work (if the field name of the radio-group is something like "radios_17[n]", the radios cannot be selected ; if the field name is "radios17", the user can select the radios, but (not surprisingly) the entry is synched between several repeater- items. 

2) in a multi-page-form, when I return to the page containing the repeater-area, all repeater-items are lost 

btw: is there an easy way to add one item to the repeater-group without user-interaction? 

Thanks for your help!

Lucas 

Update: issue #1 seems to be fixed now; issue #2 remains open