Hi Lelask,
Can you kindly confirm if you adjusted the Auto Forward settings via the cog wheel for "Auto Forward," or did you do it using Override (and you also have Override turned on)?
If you adjusted the delay from the Auto Forward settings window and then you also have Override Turned on (with a different Auto Forward setting enabled), the settings in Override will take precedence (so whatever settings you have in the Auto Forward settings window will not take effect).
If you don't have Override on, or you didn't enable the Auto Forward settings inside Override, and the last equation still gets flashed too fast, perhaps there is actually a technical issue that we can look into.
Please send us a Diagnostic Report for your Little Math so we can troubleshoot further. You may refer to this article for instructions on how to create a report:
http://support.brillkids.com/index.php/article/little-math-reporting-bugs