Order number on checkout page is wrong

When someone places an order, they get the order number but minus 1.

So if their order number is actually 100, it would say "99". If they refresh the page, it shows "100" as the correct one.

Does anyone know why this could be happening?

joecooper:

When someone places an order, they get the order number but minus 1.

So if their order number is actually 100, it would say "99". If they refresh the page, it shows "100" as the correct one.

Does anyone know why this could be happening?

What version of zencart are you running? Any modules you are running? Are the orders you have in sequential order or are they skipping? What about the email they are receiving is that correct?

This was happening from the first install of v153 with just a theme added. I have removed the order number for now, and will rewrite the code to get the correct order number. Not sure why this is only affecting me.

joecooper:

This was happening from the first install of v153 with just a theme added. ....

Which template did you add? Is it one from Template Monster?