As I do RKs, Ks should become more difficult?

I used to do kegels for a long period of time, well until I began a routine in accordance with reverse kegels. Now I do them evenly, and I find a tight 25 second kegel is very difficult, where-as before I could keep it tight for minutes.

I'm theorizing because the RK muscle is developing more, even un-flexed, it's opposing the K movement. So, my PC flexing isn't necessarily weaker, it just has more work to do, making them more difficult.

Please tell me this makes sense, and I'm not just becoming weaker.

Your muscle is less tensed up ,it should not affect strength in the normal sense but it will make them less tight.

RK isn't a muscle, but rather learning to relax the PC/BC and stretch with the help of a push from your abs. If you stretched too much, you could get weaker, but it sounds like you have a balanced routine. Try doing a higher % of standard K and see if that helps.