@ShaneNewville I really like the way Poser 9/2012 did Animation. They really messed it up in Poser 10 and did fix a couple of issues that I reported such as the RED and BLACK lines being reversed. It also appears that they fixed the collapse feature when they released the special batch to take care of Microsoft Edge. Prior to that release Poser 10 would add the value of the prior frame into the time line which caused the movements to head to the upper (lower) reaches of the movement range. That was another bug I reported in Poser 11 around Service Release 11.0.0.3 or .4.

There are several dozen animation issues that need fixing, However I don't really believe they know how Poser works. So I figure give them a really easy underhanded slow pitch to see if they can even do that. Thought about the Spline problem and came up with another possible way the spline function is called and that is

Spline(Last Key Value, Number of frames away, Current Key Value, Next Key Value, Number of frames away)

This makes sense as if you put in Zeros for number of frames away you can make it a Break. So if it is Zero make the Last and Next frames away 1 instead of Zero. Probably need to make a coouple of more simple fixes and be done. Thinking about this some more it would also greatly reduce the sliding effect that you get when you turn off IK after making a movement with it on.

Poser 5, 6, 7, 8, Poser Pro 9 (2012), 10 (2014), 11, 12, 13