Please may you identify and resolve the problems in my online test taking?

I can’t offer a diagnosis, but I can readily tell you your grammar is good. You rarely make errors in your writing on here, and we look for poor English.

I think taking online tests is fine. It’s a way to understand yourself better. I think I would not put great importance on the result. Perhaps you could view it lightheartedly. You could try anyway.

@Hawaii_Jake My guess is that they want money from me to take their remedial grammar class online. Seeing that the test always says that my grammar needs work? It is profitable to give a failing mark to almost everyone. Out of university, 20 years ago, I scored 30%, last year 55% and last month 63%.

I was wondering If I had an extra 2.5 hours that I could take the time to calm down? Maybe order a pizza or take a hot shower, and still have the last hour to try the last questions again?

It’s hard to say if it’s a scam. I’m sure they want people to pay for their course. I think stretching out the time you take will help you relax and get a better score.

I think you are right about the profit issue. It seems to me like those pictures in a comic book, draw this picture and see if you qualify for art school. Also like many auditions. They tell you how wonderful you are, then hand you a packet of information on how much they charge for portfolios and photography, and acting lessons, and a whole list of things, with no prospect of work ahead.
Your grammar is indeed good. What I see here is, your goal used to be about improving your grammar, but lately it has become more about the test itself.
I think you should write out a schedule for yourself, and stick to it precisely. Example:
Test for thirty minutes. Do not race.
Spend ten minutes to use the bathroom, get a beverage, and step outside for three deep breaths.
Test for fifteen minutes.
Order a pizza. Do not eat more than two slices. Don’t eat fast.
Go down and up, or up and down a flight of stairs once.
Finish the test.
Eat more pizza.

I think if you schedule a couple of breaks, including a bit of physical activity during at least one, you will find finishing the test much easier. If you eat, don’t stuff yourself, that will make you lazy.

But really, your grammar is good.
If you end up scoring 100%, you should tell them they owe you a job! (I had to include a little humor.)

@RedDeerGuy1 “After 20 minutes or so I flip out and just answer randomly to get over the test.”

This is why the university is recommending a remedial grammar course. The test doesn’t know you are answering randomly, so it cannot properly evaluate you. Like @Hawaii_Jake and @Patty_Melt said, there’s nothing wrong with your grammar—and you certainly don’t need a $900 class. If anything, what you need is a strategy for making it through long tasks.

You might consider taking something like @Patty_Melt‘s suggestion and working your way up to it step by step. So you could test for 25 minutes one day, then 30 minutes on another day, then 30 minutes/break/15 minutes, and so forth until you can make it all the way to the end. And of course, you can apply this strategy to other long tasks as well.

There is really no point in answering randomly. Once you begin feeling tired it is best to stop. People are usually more alert at certain times of the day, some are morning people others work best in the evening. Try and take the test at a time when you are most productive. Find a way to motivate yourself by giving yourself a reward. You might be able to answer all the easy questions first then come back to tackle the harder ones. Don’t guess randomly, with English questions you can often make an educated guess as the correct answer just sounds better.