@Sam - Check to see what format you have the dates column in Excel. If you have the dates in number format, then it will display numbers starting from 1/0/1900.
Examples: 1/0/1900 = 0, 2/12/2012 = 40951
Change the date column to date format (there are multiple you can select from) and you should be good to go.
Happy 
oodling!
For most people, using the built-in aggregations work. For example, switching aggregation to weighted means and then giving each of the four columns 25% of the grade.
If you really want to enter a formula though, you have to make sure you enter the ID numbers first. When you go into Categories & Items and then select the calculator next to the category total or course total (depending where these items relate to the overall grade), you will then see boxes next to each grade item. Enter an item number for each grade item you are going to use in your formula and select Add id numbers button down at the bottom. (It looks like you have done this already).
When you are putting together the formula, you have to include the double square brackets for each grade item. In addition, use normal paratheses, not curly brackets. So your formula should probably be:
=average([ [E01] ],[ [P01] ],[ [Q02] ])
UPDATE: I had to include spaces in formula because it looks like Moodle converts those double square brackets to create links. So your only problem may have been you were using curly brackets instead of paratheses. You could copy the formula I have above and remove the spaces between square brackets or see image below.
Happy oodling!
First, I would like to point out that we can't actually get into your Moodle site as we don't have the credentials (a username and password) to do so. Wouldn't be a good idea to give a random person access either to troubleshoot. Most of us here are really nice people but it only takes one to ruin the fun. Also, I'm not sure of where you are located but in my state and country, it is against certain laws to publish grades of a student without their knowledge.
Second, as a possible cause, go into the gradebook > Categories and Items and see if you have the quizzes locked. If they are locked, then the gradebook won't be updated to reflect the highest score. They will reflect the score that was there when the item was locked. Once unlocked, they will update.
Happy oodling!
The Safe Exam Browser (SEB) has been around for a while now so I would say it is ready for production use.
By enabling the SEB for your site, it adds the option in the quiz security settings to require the SEB to be used to take the quiz. Instructors would just have to set that for each quiz they want to use it with and they are done.
My university has recently enabled the SEB for our site but we make very specific recommendations. We advertise the SEB as something that can be used in proctored computer labs only. The reason being that if you had users at home installing the SEB onto their computer, yes it would block all applications and other browsers from being able to be used on that computer but the user could just have another computer or smart phone with him/her to look up answers.
So we inform instructors to have their computer techs install the SEB onto their computer labs, set the SEB to be required for the quiz in the quiz settings and also set an IP range in the quiz settings for further security. The SEB will do the job of blocking all other applications and the proctors can focus on making sure their are no phones out, tablets, etc. So I see the SEB as a complement to proctors, not a full blown replacement.
For more information on the SEB, see their official website - http://www.safeexambrowser.org/news_en.html
Happy oodling!
I could see this as being a very slipperly slope if you give students permissions to create questions in your question bank. First, I don't think you could set it to only allow them to post to one category without some heavy customization. Second, why not use the a forum to do this instead?
You could set up a forum and instruct users to post their questions there. Then other students could reply to it with suggestions/improvements and other thoughts. If you wanted to allow students to also rate these posts, you can override a permission in that forum to allow them to. In 1.9 this permission was called mod/forum:rate (Rate posts) I'm assuming it has the same name or close to the same name in 2.x. Set that to allow for students and then they can rate each other posts.
I think it would be a good idea to have this creation of questions and peer evaluation in a forum instead of trying to get them to post directly to the question bank. By using a forum, it still gives the instructor final authority over what makes it to the question bank.
Happy oodling!