when you are vamped those stats which you mentioned get doubled. Attributes and stats are different things entirely aswell.
And looking at the example raws:
[I_EFFECT:ADD_SYNDROME]
[IE_TARGET:A]
[IE_IMMEDIATE]
[IE_ARENA_NAME:Vampire]
[SYNDROME]
[SYN_CLASS:VAMPCURSE]
[CE_ADD_TAG:BLOODSUCKER:NO_AGING:STERILE:NOT_LIVING:NOEXERT:NOPAIN:NOBREATHE:NOSTUN:NONAUSEA:NO_DIZZINESS:NO_FEVERS:PARALYZEIMMUNE:NO_EAT:NO_DRINK:NO_SLEEP:NO_PHYS_ATT_GAIN:NO_PHYS_ATT_RUST:START:0]
[CE_PHYS_ATT_CHANGE:STRENGTH:200:0:AGILITY:200:0:TOUGHNESS:200:0:START:0]
[CE_MATERIAL_FORCE_MULTIPLIER:MAT_MULT:NONE:NONE:1:2]
[CE_BODY_MAT_INTERACTION:MAT_TOKEN:RESERVED_BLOOD:START:0]
[CE:INTERACTION:VAMPIRE_CURSE]
[CE:SYNDROME_TAG:SYN_INGESTED]
[CE:SYNDROME_TAG:SYN_INJECTED]
[CE_DISPLAY_TILE:TILE:165:4:0:0:START:0:CAN_BE_HIDDEN]
[CE_DISPLAY_NAME:NAME:vampire:vampires:vampiric:START:0:CAN_BE_HIDDEN]
[CE_BP_APPEARANCE_MODIFIER:START:0:BP:BY_CATEGORY:TOOTH:APPEARANCE_MODIFIER:LENGTH:150]
[CE:COUNTER_TRIGGER:DRINKING_BLOOD:1:NONE:REQUIRED]
[CE_SENSE_CREATURE_CLASS:START:0:CLASS:GENERAL_POISON:15:4:0:1]
You see that the strength agility and toughness are doubled (which would likely make them high, which looks exactly what happened to you) and then fixed via the nophysattgain token. However, their Skills can still get leveled up , but no physical attributes can change after the initial doubling. (strength agility toughness) etc
SO until someone takes a screenshot of their adventurer after being vamped physical attributes, then takes a new screenshot after one of them increases i will believe what the raws say.
also:
attribute info
http://dwarffortresswiki.org/index.php/DF2014:Attribute