High Rpm for Ford Eacort 1997?

We just noticed yesterday that my husband's rpm is higher than my car. It doesn't seem to drive any differently and there's no burning smell so I'm wondering what it could be. At 70 mph it's between 3.5-4 Rpm. I'm praying it's not the transmission but everything I'm reading says it may be.
190,324 miles

Muffler or resonator delete?

So I have a 2012 Ford Raptor 6.2L. It has a magnaflow muffler, but I want it louder. Should I do a muffler or resonator delete, or both?

Why does my car alarm keep going off?

I purchased a 2003 Ford Sport Trac XLT and they car alarm was not stock. It appears to be an UNGO Clarion SR9000. Anytime I'm near the cars driver side, the alarm will chirp and sometimes go off. It's a neat feature but it's very unnecessary since I'll be at the store and the person parked to my left will accidentally set off the alarm. Also, the key fob won't unlock the doors at times even though the key fob display shows the car as unlocked. The key fob battery is brand new. Any ideas?