Your urine could of just been diluted. when did you take it. Also, it could be because your test is from a different lot, and may not have as much dye in it as the previous test's you were using. Your lines are still pretty light, which mean's that your not that far along, so I wouldn't be concerned about it not being as dark yet, bc it could just be bc your hcg was diluted in your urine. Will you post a pic please of the last test? Do you know what dpo you are?