I'm running BH&HII v1.31. I occasionally advance time manually. When I try to advance one week the next screen shows activity for the next seven days but the following screen shows that it has been advanced only one day. The same thing happens when trying to advance one month - it actually advances only one day.

I can't see it here. If it's occasionally, can you make a note of the squadron, and date of the day before you tried to advance? i.e. try to make a note of the date before you advance, and if it goes wrong let us know the details please?
Also if it does happen, if you can gather the logs and the pilot logs (as per last 2 pages of the WOFF BH&HII FAQ - available from the Support page on our website) and send to Support email (don't post any logs here).

Thanks hoongadoonga

OK actually we have found what that is - it's because of the new change to stop advancing too many days when a major offensive/ battle starts, so it's now not allowing you to advance that many days and miss the start of the Battle.

in V1.27
2) When a Ground Battle exists in your region, or is about to start in the next few days in your region, then time always advances by 1 day only. This will help ensure you do not miss the start of a battle.

Change one thing and 300 other things get affected.

It will be fixed in V1.32.

Thanks. You guys are the best!

V1.32 is out now.