@mauriceserrano Hi, congrats for passing the exam!
Regarding your first question, yes, your agent is right, you need to have 7 band score for each section of ielts to gain 10 pts. Sadly, you have to repeat your english exam. Try PTE it is easier.
On your employment history, your Lab Tech assessment was >7 years while the MLS exam result was >3 years. That is ok because DIBP will verify this with AIMS during your visa processing. Tell your agent to follow the Lab tech assessment (10pts max) and use the MLS ANZSCO code.
Since you cant claim 10 pts from your english exam, I guess your total score is only 55pts. Assuming you're 25-32 yrs old. You need 60 for 189 visa. You can try 190 visa also. July 1 is nearing anyway.
I hope this helps. Please correct me if Im wrong coz Im no expert on this. I too only base my opinion on what I read on this forum. đŸ™‚>-