Got a lil' glitch in myh giddy-up.

[Jay-Dubb]

Darn thing isn't shifting right! Took it out this morning and it wasn't shifting til about 6000 RPMs. Also, it won't shift back to first once at a complete stop. I checked the fluids and there all clean, so I'm thinking it's an electrical problem. It's an automatic that had just been flushed and was running so perfect up til' today! Somebody tell me what happened!