Hi,
To address your horizontal wrinkle, smile, usually caused by the crotch length is too short, and it also effects the inseam fit.
Should be adjusted front and back. Sound like you adjusted the Shorten line too much.
I am 5'2" and have a higher waist line so do not touch the s/l line in that area.
Think 1/2 inch for first adjustment if needed and 1/4 inch after that.
Do you have any books with adjustments that would show you about pants fitting?

Thanks for your suggestions. I've looked at several books but am still having trouble making things work. I will try what you suggest. Thanks again.

Suggestions

Site listed below.

Check with your friends or local library.
Sewers always have books they are willing to share.

Try and find something with pictures, have sewn for over 45 years still like the pictures.

Fitting Finesse by Nancy Zieman.

Have you tried to google sewing pants that fit or alterations on pants tutorial?
Hate to see someone spend money on a bunch of books if they can get the information free, once you get the right technique you can use it on most of your pants.

Here is a link that might be useful: pants that fit

Hi: Try looking in the Vogue patterns at Sandra Betina pants. Her instructions are very good and alterations are to.

Bonnie

I would cut from cheap fabric (some Walmart's till have fabric & have the dollar tables.) I would baste &/or pin on that & then use it for my pattern. Someone else can pin on you better than you can your self. Are you using a pattern with a waist band or elastic? If you are using elastic, you can get the pants trimmed to fit you in the waist length area...leaving a 5/8s seam allowance. Then cut a waist casing for your elastic & sew it on your new adjusted waist length. This method works good for those with larger rears, smaller rears or a tummy that takes up crotch length. Just add or take away fabric & the top edge will no longer be straight so you could turn down fabric for a casing but you can cut & add a straight casing to run your elastic through.

Is your extra fabric in the rear making them too big around? If so & with the legs being too big, you may be using a pattern that is too big. Some garments have a "relaxed" fit & just run bigger than other styles in the same size. Your pattern should state the finished size on the pattern pieces. Compare that to your measurement. 2-3inches more than your measurement should be about right for some ease but not be too loose.