I take my blood pressure on a home machine. The first systolic reading is consistently higher than the others. It can go from 146 /82, then 131/ 80 and then 124/81 The rest period between taking the measurements is short, maybe a minute or so. As others have asked how come?  and which is right ?
Blood pressure is a dynamic vital which tends to change according to need to the body and nits never static.  All the readings you mentioned are in normal range except 146 upper, if it was post any form of exertion it's ok, otherwise you may consider lifestyle modifications like exercise and cutting salt in diet to prevent any future risk of hypertension.  However, to reassure you on the present day all is fine and you don't need to worry Regards Chat Doctor.