Some questions I have is where did your razors come from, who honed them, etc? How experienced are you with stropping razors, is this new for you? It took me a while to strop correctly and not round the edge of the razor when I stropped. I was dulling my razor before I shaved with it on the strop. This was almost three years ago but it's still something I think new straight shavers can miss.

If you are suffering still and have a properly honed blade and strop correctly then your prep, and shaving technique itself is off some where.
When I used a Mach III years ago I always had bad razor burn and a red face, I shaved every three days or less...I hated shaving. I shave daily now without any issues, of course I had to learn a lot to get to the point where I can shave properly with the straight razor.

1) the angle of the blade is probably way too high for your skin and you're irritating yourself. I would start with a flat angle and stretch the skin way up there to shave. Move your angle upward as you shave each time and see what cuts the best for you.

2) I would like to know how your razors were honed, ask the Vendors you used, etc...

3) I wouldn't rely on tricks like adding Glycerin right now to your lather. Some people love this stuff, but why add more variables when you don't even know what the problem is yet?

4) strop slow and make sure your razor isn't leaving the strop. You do not need to strop fast to strop, slow about a second each way up and down is fine and works.

5) When you use a straight razor I can't help but express that you should be using a slicing stroke with your downward stroke. Let's say you are shaving WTG, you shouldn't just be mowing through your facial hair with a WTG stroke like an Ax cutting in a tree. You need to slice laterally with the razor while moving downward at the same time so the hairs are cut like a knife in a steak or bread. You need to be VERY careful with this as you can cut yourself if you're using too much lateral movement. This is the way barber's use their razors and how they were taught to shave people. I actually saw a video of a master barber teaching on a client how to make the proper stroke and he mentioned several times that this is very important to get a good shave that doesn't hurt your skin. It also prevents the need for an ATG pass as the shaves become a lot closer than without this stroke.

Hope this helps you,

Nick