Modify a Customized Inventory System using jQGrid & PHP

I have developed a customized inventory system using jQGrid PHP ([login to view URL]) with some minor bugs in there. I need a person to fix those minor bugs in shortest time with my budget. There's no negotiation on the budget. But, if you deliver your work in shorter time with 100% satisfaction I will pay more than what I proposed as budget. Look at this link [login to view URL] username : admin password : admin System flow:- 1) admin will insert own company details, set another user, insert product and company details 2) admin will insert a docket which does have many products in there 3) admin will insert data for each delivery of the docket & it's products 4) admin can download the invoice Go to Entries > Docket & Deliveries page.. Play around and list those bugs together with proposal.. I need only potential freelancer to complete my work on promising time. Those potential can bee seen by the way your are listing the bugs and giving suggestions.. What must include in proposal :- 1) Bugs in the listed system page 2) timeline to complete it 3) Suggestions to make it better I don't want to see any of your work or so so so on.. My budget is MYR500 only. No upfront payment will be paid.. There will be 2 milestones ONLY.. First payment 35% of initial budget will be on, implementation on your own server. I will test on your server. Second payment remaining of the budget will be on, implementation on my own server and the system runs well.