it could be that your cervix takes up some of the space?
residual slobber spotting usually starts right after reinserting and from what i understand stops after some time. especially since your cup sits low, you can run your finger around it thoroughly, also when you're inserting in the morning it might be a good idea not to get dressed for some time and then wash yourself down there once again.
btw as for low cervix+capacity... surprisingly enough, you might be able to get more capacity with a medium meluna. it's wider at the top but mostly narrower, so it ensures your cervix is inside or above the cup but doesn't take up capacity.
also with the bleeding during removal, your cervix is probably sitting in blood so it just drips like when you dip anything into liquid.

Yep, you're right that between emptying your cup and re-inserting it again that it's very likely you're going to get a bit of menstrual fluid on your vaginal walls that may make its way out even if you have your cup back in again. In this community it's often referred to as "residual slobber". ;) If you are emptying your cup in a situation where you have the opportunity to do so (I know it's not always easy if you have to change your cup in a public bathroom), swirling your finger around the outside of your cup after you re-insert it (like if you were checking to make sure it was open/over your cervix) will often take care of that.

However, it's possible that this is not the (only) culprit behind your cup leaking before it's completely full. You mentioned that you have a low cervix, which if you're like me (mine is also quite low) means that your cervix may be sitting partly inside your cup and taking up some of the space, reducing the capacity of your cup and making it more likely to leak before "full". Unfortunately there's not a lot you can do about that without switching to a cup with more capacity (I know this can be challenging for us low-cervixed gals), or a cup that's narrower at the mouth so your cervix can't fit inside as easily (which seems counterintuitive for more capacity since this usually means a smaller cup, but if your cervix isn't inside, you may end up with more capacity overall...). I'm not totally sure that's what's happening for you here, but it's something to keep in mind if you keep having leakage problems without a full cup.

Good luck! :)

As the others have said, your cervix is taking up room in the cup (perfectly normal) and you're experiencing "residual slobber." (Ugh, I hate it too.)

Now you know how long you can go before the cup needs to be emptied -- and that you'll need a liner of some type on your heavy days for slobber. If you read some posts at the leakage & spotting tag, you'll find some good advice on how to combat the slobber. Me, I was never able to conquer it completely. But having to wear a liner on my heavy days is a small price to pay for the other benefits of cups.

Hah! I feel so trendy using cup slang... "residual slobber." I thought I was abnormal for having this happen but I was too shy to ask my other cup-using friends. Thanks for putting me at ease!

Tee hee, cup slang. I hope your Selene turns out to be your "Goldilocks Cup" -- cos it's "juuuust riiiight!"

i currently use a large Fleur for my heavy days and can fill it in an about an hour or less on my flood days. when i do remove it to empty, there's still blood running out of my body, so after re-insertion, i use tp or a wipe to get rid of as much residual slobber as possible, but I also use cloth pads for those heavy days so in case i don't get it all or if i have an overflow cause i can't get to a bathroom fast enough.

sounds like you're probably right about your assumption.

Yup, this is the "slobber" people talk about. (Unappealing name, but there it is.) I usually just wear black panties on my heavy days since I don't feel like it's enough to warrant a liner but I don't wanna see stains either.

It doesn't sound like you're bleeding abnormally heavily to me- a lot of users have to empty their cups every 4-6 hours or so on heavy days, and some even more than that. YOu're doing fine. :)

I'll second the idea of yoru cervix taking up space, mine certainly does.

Normally I prefer to empty my cup a bit early, so insertion and removal will always be clean.

But... Sometimes I forget, and I let my cup get really full! Ooops! At those times, there can be some blood left over up there after the cup is removed. If there is, I just wrap tissue paper around my hand and make it like a small pad, then wear it down there while I wash my cup. If you need to, you can even put it slightly between the labia, just to make it stay better. It will absorb everything while you wash the cup, and keep your legs and clothes dry. By the time you go to reinsert your cup, things are fairly dry down there.

But as for the residual blood up inside, I like to let my cup pop open early, then coax it up further. That way it will kind of "scoop up" all the residual stuff on the way up.

As you go along, you learn all sorts of neat little tricks to make the cup do whatever you want it to. :)