Quest labs; change in testing?

[Razzle Dazzle]

Anyone that does bloodwork on the regular and uses quest. Have you noticed a shift in Total Test results? Have at least 10 tests on 350mg- 425mg all within close proximity. Then last 2 tests are roughly 1/2 of previous testing results for Total Test. Thought maybe a bad bottle of test so I tossed it and opened bottle from different sponsor. Retested 4-5 weeks later and results still not matching the average of last 10 tests. Just trying to think of every aspect/angle/variable and not just jump to misdosed gear.