It sounds like you have a corrupted 'messages_en' file.
I use WB's mission orders lite mod so excuse me if I refer to that:
http://www.filefront.com/14067951/GW...n_Os_Lite.rar/
Install the above via JSGME
Create a new career commencing Aug 38 with 7/13 Flotilla out of Konigsberg.
If you are using SH3 Commander set the number of days between patrols to 15 or 21
At 23:30 on 4th you will receive an order calling you back to Konigsberg and instructing you to apply for a transfer to 1st or 2nd Flotilla
Hit Esc key and teleport back
At the commencement of your second patrol in whichever flotilla you chose to transfer to you will have a start date of 19th or 25th Aug (depending on how many days in port between patrols you selected).
This gives you time to transit to your assigned grid prior to the commencement of hostilities as happened in RL.
*In RL the departure date was 19th August but I am aware that some people (myself included) prefer a start date of the 25th because that is still sufficient time and your less likely to be kicking your heels ingame waiting for the fireworks to begin*