Were they blue dye? I have had 3 come up positive but from my other pregnancies I know that I have slow rising numbers I got 3 positive.
false positives are rare...i doubt you'd have 2. if we're talking really really faint though (as it seems) i'd personally want to rule out evap lines. test again in a few days with first morning urine. if the line's darker, you definitely are pregnant and make a drs appointment.