Does it work good with synergis mod?

That is odd. Not sure my mod would affect much with how the stash works. This has happened after you installed this version and after you had another version installed?

It's possible something became corrupted when you switched versions. I hope not. Maybe try Lunar's way of switching mods. Install high drop with medium. Start game, then exit and turn off high drop again. Then start the game. Maybe it will fix the issue.

Let me know if you are still having this issue.

I've been liking this so far (wish I'd waited to do the trick Lunar came up with, but eh, not much was lost), but I seem to be having a weird bug where every time I start up the game again and launch my character, all of the things I'd put in my stash the previous time I played are gone! So far I've lost some pretty important stuff, too. :(

Oddly enough, the last time I'd played, none of the stuff in my stash showed up in Zeryphesh, but when I went back to the Estherian Enclave to so a loot run, they were all in those stash boxes. I'm using only one other mod that may be part of the problem (Bag Mod), but I never had an issue with it while using the Medium drop rate of yours.
Any idea what may be causing this and how to fix it? :(

Ha, nice trick. I like it.

Oddly found this out a bit ago that seems to work fine. Having both selected, Medium High Drop over Normal Drop Rate. Enter game and Character, Save, quit game and unselect Normal Drop Rate. Items stay and Medium High Drop Rate is active.

Not sure on that one to be honest. Haven't ever tested that. Back up your character before doing so. Maybe try putting items in your shared stash and then changing mods. You might be able to copy the shared stash in with the items.

Anyway of replacing Normal Drop rate mod for Medium High Drop Rate without deleting the items from the character?