LoopOut expression - bug - please confirm

Question

Can somebody try this and confirm I'm not crazy.
******BUG******
LoopOut and LoopIn do not cycle properly with Position property.
Steps to reproduce bug:
1. Create a composition at 960x540
2. Create a solid that is 50x50
3. On frame 0, keyframe the position of the solid at 540,500.
4. Copy that keyframe to Frame 1
5. On frame 5, keyframe the solid's position to 540,100.
6. Copy that keyframe to frame 6.
7. Add an expression to the Position property: loopOut ("cycle",0)
Results:  If you watch the position values as you step the frames, you will see the pattern keeps changing and is not a consistent cycle. Sometimes the 500 value is repeated, and sometimes the 100 value is repeated.  It is inconsistent.
Expected results: The position values should change following a fixed pattern and not vary after the final keyframe.

Answer 1

Thanks for following up, but I do believe it's a bug.  Follow along closely -- because I know it gets confusing...
(BTW, I'm now using CC on a PC).
If you use my original scenario.
Then the Y value for frames 0 through 6 are: 500, 500, 400, 300, 200, 100, 100 -- then the loop begins since the second 100 is the last keyframe.
As it continues, you would expect it to go back to the beginning and cycle through those same numbers BUT not the second 100 since that's the end of the loop and it ignores the last keyframe for purposes of cycling.
Jump ahead to....
Frame 12 is 500 (as expected) - the beginning of a cycle
Frame 13 is 500 (as expected). 
Frame 17 is 100 (as expected) - the end of the cycle
Frame 18 is 100 (not expected) -- why is 100 doubling up now when that last keyframe should be ignored?
Frame 19 is 500 (as expected)
Frame 20 is 400 (not expected) - why didn't 500 double up like it did on frame 12 and 13?  It's because the 100 doubled up instead and took it's place in the cycle.
Frame 23 is 100 (as expected)
Frame 24 is 500 (as expected)
Frame 25 is 500 (as expected -- now 500 is doubling up again. But it didn't on frame 20?
This cycle continues where 500 is duplicated on one cycle and the 100 is duplicated on the next cycle... meaning there is a cycle but it's twice the length of the original keyframes.  It is cycling over 12 frames instead of 6.
Now here is why I definitely think what I'm seeing is a bug -- move the latter two keyframes from frames 5,6 to 7,8.
As soon as you do this the doubling of the 100 keyframe stops occurring in the pattern and it behaves as expected.  The issue seems to be related to short duration loops.