Hi Matt,
Thanks for the quick response. I received the fix in my mailbox. Fix applied and those strange output disappear.
Regarding the problem on single page order form, everytime i finished ordering a package + new domain registration, the total amount of money stated in the invoice is not correct. The domain price is not included in the invoice. Other amount is stated in invoice, such as the price of the hosting package, add-on product, promotion discount. It's just the domain price does not show up in invoice.
And also in the single page order form, if i applied a promotion code on the form, the value of the client custom field and the value of add-on go empty / not saved. So if want to submit an order, i have to fill in the client custom filed and check/tick the addon option again. I am using a client custom field to ask my client of his/her desired cpanel username (it is a required field).
Thanks for the support,
tulolit.