If I understand what you're asking -
You have to use the INNO copy and paste function ONLY on the first item (of many), then use the INNO COPY for next one, and then a PASTE for the next one (as a pair of functions) - for each subsequent one you want. I use Ctrl-C to copy, and Ctrl-V to paste. It's faster than right click menu choices.
For example, if you want to copy a conversation of 6 lines (3 from you, and 3 from a friend you're messaging...) you had with someone, and each post made in the back-and-forth of a topic, do this:
1) Use Inno's - Copy and paste function choice, first and ONLY 1 time on conversation point 1.
2) for each additional section of conversation (in our example, 2 thru 5 more), COPY # 2 (not copy/paste), then paste #2 only. Do the same for 3, 4, 5, 6 the same way - copy it, then paste it - one at a time.
The COPY reconstruction takes time, but will be a complete chain of items those 6 items (3 each from you and your friend...) in 1 buffer.
Unfortunately, you can't copy the entire thing as a full "screen grab" of all the back and forth discussion posts in 1 topic. The design of posted message "blocks" does not allow you to cross over and get 2 different ones, from different posters. You have to get them 1 at a time, and assemble them into the same stream you took them from - as a copy of that.
Yes - it's kinda UGH.