Late notices are computer-generated and the computer doesn't know why you are late. Do you have their phone number? Call and see what you can work out. It's not making a lot of sense. Any time I've had time out issues they magically clear up the next day. One other thing to check, you said you resized the photos, to what?
BTW, you don't want to hear this now, but any company I've worked for with regularity has these type of issues at some point. For me it always happens when I've had an otherwise great day and everything is getting wrapped up on time.
Equal rights for others does not mean fewer rights for you. It's not pie.
"I prefer someone who burns the flag and then wraps themselves up in the Constitution over someone who burns the Constitution and then wraps themselves up in the flag." -Molly Ivins
Never try to teach a pig to sing. It's a waste of your time and it really annoys the pig.