Please Allow us to add Drop-Ins to Past Dates!

We need to be able to enter students as Drop-Ins on PAST DATES! Currently I can only add them in advance or during the class. As soon as the class is over, I can no longer add them to the drop-ins list. Which means they may get missed in being charged to pay for that drop-in! With a name like "drop-in", many people assume they don't have to pre-register and can just literally "drop-in". And we often won't hear about the extra students attending until after the class or even the next day. At that point, DSP will not let us add the drop-in attendance to their account. This is a large oversight that needs to be corrected please. We cannot complete our accounting without this ability to log properly and accurately without the proper checks and balances to apply. This would be very much appreciated! Thank you so much! :o)