This is why they say ymmv. Some peopke react better to lower, some mediocre, some hifher, doses. Everuone is different. Always get a hard copy of your labs for yourself, ahead of the appt., to look over possible concerns the doctor may miss, to bring up eith them. Doctors are always busy. It could be any range of factors from 17OHP to DHEA, which is why endos typically are a better choice for the field of hrt.
To me it sounds like spiro is too low with mediocre estrogen dose- or, that spiro is mediocre with low estrogen dose. It is wise to stay with the same endo for around two years, as it sometimes can take that long to find the dose that best "clicks", or the body to "get it"- which can take up to a year in some cases. Also note it takes cis females 5-10 years to complete puberty, it is not a short race, but rather one of long term stamina. Remember, your body was used to making one sex defining hormone primarily for years and years on end, and you are askibg it to please stop as it is time for the "right one" to take over. Definitely get a hard copy of that lab pre endo appt., and go over it. Check normal female levels for each chemical. LH and FSH should go down as well as SHBG, in order for T production to shut off. Sounds like low dose or middle dose spiro, with low dose oral e, to me. Females in puberty have extremely high levels of E. Hope this helped!