And you have posted the wrong links to your photos so I for one could not view any of them.
the site has FILE SIZE limits on images to avoid spending a fortune on disc space
So load your photos onto a computer
Open them in what ever image editing programe you have
Resize then to be 12" along the longest side , set the resolution to 72 dpi and the file type to JPG then save them and rename them some thing like Forum1 , forum 2 etc so you do not get confused between the file for here and the original file
These will upload, up to 10 at a time ( if you use Windows ) or 1 at a time on a mac
Phones default file type is raw and a raw file appear to be around 10 time bigger than it is to web servers if they are not written to accept raw images from a phone .
Tis is exactly why Instagram was originally written because it would resize & upload imaged directly from a phone .
Phones cheat with their pixel coding so that they can write the image file quickly and use a smaller amount of space to store the image .