I followed the instructions on this link (last answer) to delete the Core Storage Logical Volume Group via terminal while pressing Cmd+R during startup and now I cannot resize the partition via Disk Utility. The post mentioned that a red error message would appear when selecting the drive, but that didn't happen. I'm stuck!

These are screenshots from the errors in Disk Utility:

After resizing the top partition by dragging down and clicking "Apply", an error message prompts. Also happens after I repair the disk.

When restarting the computer, a grey screen with error icon appears.

Any help would be greatly appreciated!