Issue with multiple accounts and lines on a phone

[ipcsolutions]

I am having the following issues with multiple accounts on a phone that I am hoping to have a resolution on.
I have two accounts configured on separate line keys. I have features.off_hook_answer.enable = 0 set to they can be answered selectively.
My problems are:
1) When one of the lines is ringing, I am unable to select the other line for outgoing calls e.g. I want to ignore the ringing line as it is a group answered line.
2) When I answer the second line, I cannot Park the call (type=10 Park linekey) as it is set for line=1. I dont want to have separate Park linekeys for each account.

Any ideas?

Thanks
Mike