Internet Accounts Bug -- Deleted accounts keep coming back

i had problem on sierra, , having intermittently on high sierra.

use mail , have exchange mail account set in internet accounts. have icloud , google set normally.
sometimes, i'll notice exchange email stops updating, realize internet accounts have reverted version exchange server office 365 instead of current exchange setup (hasn't been office 365 on year) , in addition facebook , twitter accounts show well, they're deactivated. google , icloud not change. setup looks have used late 2015/early 2016. i'll delete added, re-add current exchange mail account, , mind business return , mail stop working. searching issues has not been helpful since cannot find real solution people problem.

now, use icloud keychain , figure fault there in internet account synching since current mbp never had these internet accounts keep showing up. but. have installed fresh version of os x high sierra already. reset icloud keychain device's keychain. changed apple id password. i've restored iphone , started fresh incase there rogue entries on iphone keychain synching over.

yet.

these accounts keep coming randomly internet accounts page under preferences , break exchange email setup. not understand why not stay deleted. have iphone , macbook pro 2 devices under icloud there not rogue device.

works you'd think deleting accounts end of it.
if know happening or better fix, i'll grateful!

 

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