can't send DMs to new followers! old followers still IN DM list!

this is a two-part question to a bug that i just submitted to twitter's support.

one) i just removed some people from my list and when i go to send anyone a DM, the users that i recently removed are STILL on the list! mind you, i removed them both on my following AND followers list. they shouldn't be on my DM list (in the drop down box) to send a DM to anymore. is this a recent bug that's going on?

at the same time:

two) some new people have followed me (and i followed back) sent me a few DMs and when i go to reply to them, after clicking the little envelope, i get a pop-up warning that says "you must follow (username) to send a DM!" and it's like "hey, i'm ALREADY following them!" now, i CAN send them a DM if i go through their profile and click "message (username)" and then go from there, but i can't do it when i go through my own direct messages link on my profile. (the image below reflects this problem.)

any help would be greatly appreciated.