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<p>Not all mechanical pencils are created equal. However, one has to question WHY people persist on using such pencils when it has been known to create problems. Why not arm yourself or your kid with the appropriate pencil? </p>
<p>As far as bleeding and bubbling errors, this should NOT happen to anyone who has practiced in earnest. It is pretty simple to develop the correct filling of the answers and take the test with the usual recommended pencils. Fwiw, group bubbling eliminates the possibility of marking an entire series of answers incorrectly. There is enough time to follow such strategy as opposed to enter the answer as you proceed. Only in the last minutes should one deviate from doing it this way.</p>
<p>Ruining months of preparation by not paying sufficient attention to the mechanics of the test is a bit silly. As far as TCB errors, it is mistake to think that they do happen often and are anything but isolated cases. It does not mean that the OP might not have had an incredible bad luck, but it seems farfetched that someone who entered 17 tests and did well would earn such scores. </p>
<p>OP, get your hands on the QAS, and adapt your preparation for next test. If this was your first, just move on and take it again. No real harm done! </p>