You won't be getting my email address, sorry.
The only way what you are stating can make sense is if you neglect to set the original size (screenshot 2 right above the part I circled)
If you neglect that, and the calendar is not a standard size (they never really are) then it may not be scanning the full calandar page, so an 80 reduction could be reducing 40% of the page by 80%.
Feel free to post pictures here within your message, or post a link to them elsewhere through here, but I will not be giving out my email address.