A view animation with "autoreverse" set to true and a "repeat" of 0 (the default) will not correctly reverse the animation when using "curve" Ti.UI.ANIMATION_CURVE_EASE_IN or Ti.UI.ANIMATION_CURVE_EASE_OUT. The animation incorrectly uses the same curve when performing the reverse animation.
If "repeat" is set to 1 or higher, this issue will only happen on the final/last repeated reverse animation. This issue won't happen on prior repeated animations.
When the curve is set to Ti.UI.ANIMATION_CURVE_EASE_IN, then the reverse animation curve is supposed to be Ti.UI.ANIMATION_CURVE_EASE_OUT.
When the curve is set to Ti.UI.ANIMATION_CURVE_EASE_OUT, then the reverse animation curve is supposed to be Ti.UI.ANIMATION_CURVE_EASE_IN.
The above is how it works in HTML5 "reverse" animation. See...
Titanium's iOS code generates its own reverse animation to work-around an Apple bug. The issue is that the reverse animation uses the same "curve" as the forward animation. This is where the reverse curve should be applied instead.