Hello there.
Let me check these you have attached and I'll get back to you. There's close to none information that could relate to the explained issue on the extension info page, so lets hope the code would yield something.
One question though. The "Monday" dynamic part would be decided on how, I didn't see anything setting how many days will be between putting the order in and the day of delivery (the "Monday" from your example, teh way I see it)?
Regards,
Dobri