Personally, my goal was never some estradiol level which even experts admit to not knowing the optimal level but that I get some breast growth, feel good, maintain/develop a feminine physical appearance, etc. Some actually do quite fine at low levels and don't need more while others may need more. It just seems to depend on the individual and their sensitivity. Also, estradiol levels fluctuate so might have been much higher anyways had you measured them earlier.
Lastly, it may also be that intracellularly (inside your cells), your E2 (estradiol) levels are much higher because of high concentrations of E1 (estrone) and E1S (estrone sulfate), typical of individuals who take estradiol orally or even sublingually, that convert to a significant amount of estradiol.