Opencart help needed

hi, i have designed an e-commerce site using OPENCART i am using a theme (JOURNAL 2.50) i have several extensions installed (import, export, rewards, shipping, etc..) i have a few errors that i'd like cleaned up: 1. when logging into admin (opencart dashboard) a few strange characters are showing up... but once you start navigating through the dashboard... they go away.. 2. on customer checkout... i am getting a few notices - Notice: Undefined index 3. bought a rewards point extension that seems to be working ok... but certain things (rewards points) don't show up on checkout.. this job is to fix the above concerns. i will look to hire someone that i can work with in the future... all future problems, errors and concerns regarding the website will be given to you. i will not be looking to hire anyone else in the future... i'd prefer to hire 1 person and deal only with them moving forward. thanks [login to view URL]