Where phantom keyframes in AAE?

Can crooked asked the question, but the point is that in between the two keyframes is unnecessary to me value. Explain with an example:

I'm sorry, I'm not an expert in language and terms, I will try to explain so that I understand.
Take 4 keyframes, each set to rotate the object.
The General procedure is this:
1 key: +69
2 key: +61
3 key: -98
4 key: -100

And in some places the timeline between keyframes is that the turn out for this interval. That is, between -98 and -100 takes a turn to -115. Where he comes from, I don't understand. Probably due to the previous manipulations. Need to neutralize these extra parameters by adding other keys, which is inconvenient. What can you recommend ?
March 19th 20 at 08:24
1 answer
March 19th 20 at 08:26
Probably takes a full turn clockwise.
The rotation looks like 0x -100.0., where the first number (0x) is the number of complete revolutions, and the second number (-100.0) is the degrees of rotation.
Check out the first day of the rotation.

Find more questions by tags Adobe After Effects