Um, hello there, I seem to have a problem with the plug-in, It seems that whenever the dualwielding character attacks, it happens twice like it should, but they do not use the weapon equipped in their offhand, instead they use barehanded, and for more information if it helps, when I disabled the barehanded attack parameter in the plug-in, the character actually does attack with a weapon in their offhand but its just seems to duplicate the main weapon and even then, after the first turn the ofhand weapon seemingly disappears, I double checked the inventory afterwards to confirm. This has been happening with my main project and I made a fresh project with only the dualwielding plug-in and YEP's battlecore engine (both unedited) to test and I still get this problem, any help would be appreciated!
I have seen this issue before in the past, so I suspect the cause is the same.
You are using a weapon to enable dual wielding on the actor. Likely the mainhand weapon, based on what you've said so far.
During the attacks, each weapon is temporarily unequipped to remove all of the traits from it when it isn't being used. The offhand weapon is removed first, so the main hand swing will only use traits from the first weapon. Afterward, the offhand weapon is re-equipped, and the main hand weapon is removed so the same can happen with the offhand swing. When the main hand weapon is removed, your actor is updated to not be capable of dual wielding anymore, because the dual wield type trait is on that weapon. This removes his offhand weapon as well, causing him to continue the second strike, but with his main (bare) hand instead.
After this happens, checking in the menu will show the offhand weapon as unequipped, and likely gone from the inventory as well.
To fix this, add the dual wield type to the actor, or class directly, instead of to the equipment he/she is wearing.
Sorry for the delay, I just got home to confirm what you said and I don't have the dual wield type on either weapon, and I moved the slot type between both the actor and their class and it still does the same thing, based on what your explanation and what happens when I disable barehanded, the offhand seems to ignored completely, I've created several projects trying to figure out what I've been doing wrong and I just cant seem to find it 
Apologies for immediately assuming that the problem was on your end, as it turns out, this is a bug introduced with the fixes posted for v2.52. I'll spare the details, but the gist of it is that an if statement was worded incorrectly, causing the dual wield sequence to lose the offhand weapon. I have corrected this in v2.53, which should now be up for download.
The other issue with turning off the barehanded attack causing both swings to look the same is also a bug on my end, and apparently has been like that since I implemented that plugin parameter. A check that checks if the wielder is dual wielding fails at a certain point during the dual wield sequence, which causes the script to continue with a second attack, but assume that the actor is only wielding one weapon, making both hits main hand swings only.
I have also corrected this issue in v2.53. As I said, the download should now be available, so feel free to verify that it is now working.
Oh YES!! Looks like everything is working with the new version you put out! And I'll also confirm that problem as well as your fix fo the barehanded duplicate problem both are good. Thank you so very much for the help and no worries about the assumption, to be quite honest I just assumed I haphazardly enabled a conflicting setting or something dumb like that haha. Regardless, I don't mind and once again, thank you for the timely response and fix!