Size export problem

I am running into a problem that was supposed to have been fixed, super similar to this posters problem https://discuss.pixls.us/t/how-to-export-exact-size/18399?u=lauren_wittkopf

After editing to fix overexposure issues I am inputting these photos into a software that produces surface models from drone imagery. For the software to process it properly I need the photos to be the same as the original footage, 4864x3648, but it continuously exports them at 4864x3646, just two pixels short on the short side. This happens no matter whether I leave the export size at 0 (in this case it shortens each side by 8??), put the correct size, or increase the parameters to 3650, 3652 or 3654. I have allow upscaling marked yes, although it shouldn’t need to upscale as that is the original photo size. If I don’t check yes-upscale, it shortens it by 8 on both sides regardless of the inputted size setting option.