Probably best to keep to one thread initially rather than opening the question in two separate places, and best to begin with the forum until such time as proven to be a bug and confirmed then a ticket can be raised.
How were you managing the number of viewed comments?
I have not understood your question fully “How were you managing the number of viewed comments?”
Can you please explain a little more kindly?
If I have understood right, I was not managing the number of viewed comments – it was automatically being managed by the BP code. If you have WP 4.1.1 and BP 2.2 please try posting 9 comments (9, for example – it can be 19 also) to an Activity stream activity – you will see 5 comments with “Show all 9” or “Show all 19”
Now try with the WP 4.1.1 and BP 2.2.1 install you have:
In BP 2.2.1 the “Show All” is lost, thus if there are 9 or 19 or 90 comments *all* are displayed at once.